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Notes: Two independent Contour Envelope Generators in a single 12hp wide Eurorack module. These are very accurate replicas of the Model D contour generators, with identical circuitry and component values running on the correct +9.3V and -10v supply voltages of the original; so they exactly replicate the original envelope response along with all of it eccentricities. Extra features include manual trigger buttons and envelope status LED's.

The contour generators played a larger part in the sound of the Model D than many people realise. There are two factors that make them unique, firstly the exponential slope when is used in conjunction with the (near) linear slope of the original VCA which is responsible for the famous Model D "punch". Secondly, the re-trigger behaviour is quite unique, multiple retriggering increases the output level so that either the volume increases incrementally, or the filter opens incrementally with each extra key press.

AJH Synth have added independent Decay switches for each individual Contour Generator rather than the shared switch on the original synthesiser, these switches change the Contour response from AD (switch up) to ADSD mode (switch down).

Notes: AJH Synth have had quite a few customers asking if we can make the gain jumpers on the MiniMod VCF and VCA modules accessible from the front panel, so this 2HP module aims to address this.

The Gain Switch Multi has two switches which connect to the gain jumpers on the VCA and VCF. Switch "up" is the same as having the gain jumper in place, switch "down" is the same as removing the jumper, and gives higher gain.

Using these switches gives a similar effect to the old "headphone out to external input" trick on the original Model D but with a much wider overdrive range, particularly from the VCA.

As an added bonus, AJH Synth have also included a six way passive multi.

Notes: This is a precision active buffer and multiple. This module has outstanding performance: it features very high input impedance, very low output impedance and an offset voltage of <1mV.

Not all active multi's are born equal, some designs do not fully solve impedance mismatch and tracking problems, or they apply offset voltages to the output and in rare cases can cause more problems than they solve!

AJH Synth have added a very useful (and unique) feature to cure tracking problems: four of the five outputs can be adjusted up or down by +/-5% from the front panel, so that VCO's and VCF's that don't track 1V/Oct exactly can be easily compensated to track correctly without having to re-calibrate the VCO or VCF themselves.

Notes: Five-channel mixer with mutes, built-in VCA, switchable overdrive and LED level meter. Simple, straightforward, high-quality stuff from AJH.

Supplier's Notes:
The MiniMod Muting Mixer & VCA is a 10HP wide, five channel audio mixer with many useful features. It is available with either a black (Dark Edition), or a silver front panel.

The mixer section has five input channels, and each channel includes a bi-colour tactile LED switch that can instantly mute or un-mute the channel, replicating the oscillator on/off switches on the original Model D synthesiser. This arrangement is more convenient than regular switches as each illuminated switch shows the on/off status of the associated channel and multiple buttons can be pressed at once, making it very useful for live performance.

AJH have also included a four segment LED level meter so that the overall level can be seen at a glance and adjusted to prevent the output from getting too "hot" and causing distortion in other modules further downstream.

It also features a VCA that is integrated into the output section, and this can be switched from linear to exponential response - this allows it to be used as a voltage controlled sub mixer or as a stand alone VCA with five inputs.

Lastly, AJH added a wonderfully soft and warm sounding overdrive circuit that can be switched in to add smooth, tube like distortion. This works in a similar fashion to a master volume guitar amplifier, so the amount of overdrive can be varied widely with different settings of channel and master output levels.

Module Width: 10hp
Module Depth: 26mm (Including power lead)
Current Usage: 55mA Positive, 25mA Negative

Notes: The MiniMod Multi Burst Envelopes module generates variable length bursts of repeating envelopes that can change over time, with CV control of all functions.

The BURSTS control selects a "Burst Sequence" of between 1 and 40 individual envelopes. The envelope shape of a burst is chosen with the rotary switch, or it can be varied using an external CV, so that it is even possible to chose a different envelope shape for each individual burst in a sequence.

The width of the envelope (i.e. the attack and decay time) is varied with the P-WIDTH control and this can also be CV controlled as a sequence is progressing, so it is possible to vary the envelope speed of each individual envelope burst while a Burst Sequence is running.

The repeat time of individual bursts in a Burst Sequence is set with the LFO Rate control. The LFO rate can be varied with an external CV as a sequence is progressing, so the gap between envelopes can speed up or slow down over time. An external clock can also time the bursts in a burst sequence instead of, or in addition to the internal LFO. Bursts can also be manually incremented with the CLK push button.

The SLOPE control allows Bursts to start quietly and build in level to maximum, or they can start at full level and then reduce in level as the Burst Sequence progresses. In the centre position all Bursts are of equal level.

Specifications

Module Width: 12hp
Module Depth: 26mm (Including power lead)
Current Usage: 28mA Positive, 12mA Negative
Individual Envelope Length: 20msecs to 2.5 seconds
Internal clock rate: Off, 0.24Hz to 51Hz, or every 4.2 seconds to every 20msecs
Envelope waveshapes: Sine, LogDown, LogUp, ExpoDown, RampUp, Triangle, RampDown, Pulse
Repeats: 1 to 40
Slope: bipolar, sloping up from 4%->100%, and sloping down from 100%->4%

Notes: Sometimes real precision is required with pitch control voltages - this module features a super accurate "Cal" output, which is accurate to <1mV over 20V, translates to one cent over 20 octaves! It is ideal for calibrating the scaling of VCO's, indeed we have been using our own version of this circuit to calibrate our own MiniMod VCO's for the last three years.

As well as being a precision voltage source it is also a very accurate voltage adder, it has two channels (A & B) and both full volts (octaves) or 1/12th volt increments (notes) can be either added to or subtracted from the incoming signal. Perfect for adding a voltage offset to the output of a sequencer or it can be used to add switchable octaves to a VCO which only has course and fine tunes controls.

It also has a "mix" output, which allows either A channel on its own, or with the three way toggle switch channel B can either be added to, or subtracted from channel B, and this is in addition to the addition and subtraction per channel mentioned earlier.

Dimensions: 10HP wide, 26mm Deep

Notes: The WaveSwarm is a waveform animator and all analogue dual channel device.

Each channel simulates up to six VCO's beating in unison with a different beat frequency between each animation. The fixed beat frequencies are generated by twelve onboard LFO's, and the front panel pots control the level of each of the six animators, along with the level of the dry signal to the final mix. In addition to independent channel inputs and outputs it also has an A+B output, which sums the outputs of the two channels, creating an effect similar to twelve VCO's in unison! This is possible because channel B uses slightly different beat frequencies to channel A, they are not identical.

The input waveform can be saw, triangle, sine or wavetable/complex waveforms, in fact most waveforms with the exception of square or PWM waves will give some form of animation.

A soft clip circuit is built in so that at higher signal levels the signal magnitude is limited by rounding the top and bottom of the waveforms, thus slightly softening the sound. There are soft clip LED indicators for both channels.

It can produce huge, fat drones or supersaw type waveforms from a single sawtooth or triangle wave input.

Notes: This 30HP wide module features twelve fixed frequency, inductor based bandpass filters, set at half octave interval spacing and covering from 125 Hz through to 5.8kHz. It also features low pass and high pass shelf filters, again they are fixed frequency and both are active inductor based circuits. It has a vintage pedigree that harks back to the original and highly sought after 914 Fixed Filter bank from the 1960's Moog 900 series modular synthesiser system, however we have brought this design up to date and made it compact enough to fit into skiff friendly Eurorack cases by using gyrator based active inductors, and have added some other very useful features too - the bands are split alternatively to left and right channels, each having their own individual output, and there is also an inbuilt Voltage Controlled cross-fader that allows panning between the left and right banks, with a mix of all bands available in the central position.

In addition, we have a second cross fader that can mix between the dry incoming signal, or an external signal fed into input 2, and this is cross-faded against the wet MIX Output - this allows Voltage Controlled crossfading from wet to dry signals, or between wet and external signals - and the level of each can be adjusted using the Input 1 and Input 2 level controls.

A further addition is the feedback control, this is similar in design to the resonance control on a regular VCF, but because of the multiple fixed filters topology it is rather different in operation - it would normally be added in small amounts to thicken up the sound, however we have allowed the feedback to traverse to quite extreme settings for howling feedback and even soft clipped self-oscillation, especially for the noise merchants out there...

Using L/C inductor topology bandpass circuits rather than the usual Sallen Key R/C active bandpass filters does give a slightly different sound and this is part of the magic of the original 914 filterbank, as the LC based circuit exhibits less phase shift against frequency that the more common Sallen Key R/C based bandpass filters that are used in many Modular synths.

Many people often wrongly assume that a fixed filter bank is exactly the same as a graphic equaliser - however this is certainly not the case, if all of the controls of a graphic EQ are set to centre then a flat frequency response is expected and the output will sound very similar, or identical to the input - this does not happen with a fixed filter bank, the frequency response rises and falls as it passes between each stage (but to a lesser extent than if the filters are all set to maximum output), so it acts as a soft slope comb filter, and the resulting output sounds very different from the input signal. Also, with all of the individual filters turned to zero there will be no output at all.

Notes: The original MiniMod Glide +Noise module was based exactly on the original Minimoog Model D circuitry, which was designed to be used with the built in Model D keyboard, and because of its vintage design its range was severely limited to 5 or 6 octaves, and it also responded to positive voltages only. Another limitation was that it would not return fully to zero when selecting long glide times, which restricted the range even more.

So we made the decision to re-design the MiniMod Glide + Noise using modern precision parts, and we have come up with an all new circuit which has exactly the same function, but with a hugely extended range. It has the same Glide slope characteristic (a slightly curved Linear Glide) as the Model D on which the MiniMod is based, however in response to many requests from customers we have adjusted the glide up and down speeds so that they are now very similar , which is much more useful in real world applications that the earlier MK1 version which (like the Model D) would glide up considerably faster than it would glide down.

The new Mk2 MiniMod Glide Noise module now has an impressive 14 octave range, and can respond to negative voltages down to -5V. This is a very useful feature, as our MiniMod VCO's will respond to negative control voltages and produce correspondingly low frequencies; so it is now possible to glide down quickly or slowly to crazy sub bass levels! The hold feature has been improved too, it covers the full audio range as well as DC control voltages, and works as a track and hold module with Eurorack signal levels.

A further enhancement is that the Mk2 module can now (using selectable jumpers) transmit or receive pitch CV to the Eurorack power bus; for example, the Glide CV Output can now be directed to the Bus in order to send CV's to (for example) three VCO's via the bus without the need for a passive multi and four patch cords!

The Noise section of the module is unchanged, except that we have slightly boosted the level of the Red Noise output to bring it more in line with Eurorack control voltage levels.

Lastly, it is much shallower - Mk1 Glide Noise had a depth of 54mm, and it was the only MiniMod module that was too deep to fit a skiff style case - and this prevented a full MiniMod system being installed into a shallow Eurorack case. The new MK2 version is only 28mm deep, so this allows both it and a full MiniMod system to be mounted into shallow skiff style Eurorack cases.

Dimensions: 6HP wide, 26mm Deep
Current draw: 36mA Positive, 38mA Negative

Notes: Really clever noise-based oscillator from AJH. Drones, sweeps and bleeps aplenty, ranging from tamed to out-of-control filth. Also doubles up as a more conventional ring mod and distortion module.

Supplier's notes:
This 14HP wide module is a voltage controlled noise based oscillator, or noisillator for short. It generates 1/f noise and this is then sent through a feedback loop which allows the noise to be "tuned" to varying degrees depending on the settings of the frequency and resonance controls, or incoming frequency or resonance CV's. The tuned circuit can be FM modulated too, for some thunderous sweeping sounds. We have bright and dark outputs, which are pre and post filter respectively. The Bright output will always have a degree of noise present in the signal, whereas the Dark output can be tuned noise only when 4 pole resonance is selected. We also have an external Sync input, which will reset the resonant waveform, and we also have an Audio input, so that an external signal can be mixed into the resonant loop. Combinations of external waveforms to these two inputs can create some massive drone sounds, or sweeping sync sounds.

There is also an XOR ring modulator, which can be used as a module in its own right too. Lastly, we have an XOR amplifier, which is another independant circuit that can be used to add noise and distortion to any audio signal.

Notes: Pan and cross fade up to three signals with AJH's versatile Triple Cross. Four different modes allow you to set up the three channels in numerous ways, for both audio and CV processing.

Supplier's Notes:
The Tone Science Triple Cross module is a design collaboration between electronic musician/composer Ian Boddy and AJH Synth.

It features three independant cross fader and panner channels, and it can be used with both audio and CV signals. Each of the channels can be configured in one of four different ways:

1) One In, One out Linear VCA

2) Two in, One out crossfader

3) One in, Two out panner,

4) Two in, Two out cross fader & reversing panner combined.

Audio rate modulation can also be used on the CV inputs to create Ring modulation and Cross modulation type sounds. Each channel has a dedicated Fade control, CV input, and CV Level attenuverter. These can be used together to bias incoming CV signals.

The L1 and L2 outputs from channels 1 and 2 are normalised to channel 3's inputs, which also have their own level controls to balance incoming signals. This allows very interesting, complex fading and panning between four different input sources, to either Mono or Stereo outputs..

The Triple Cross is very versatile, yet relatively simple to understand and use. However, as they say "knowledge is power", so do spend a little time reading about how to configure the channels in the four different modes, and how to combine all three channels together to create a super-powerful Four to Two to One cross fader.
Each of the three channels can be configured in four different ways, and all three can be used simultaneously. They do not all have to be in the same mode, so we could for example use channel 1 as a cross fader, channel 2 as a Panner for completely different signals, and channel 3 as a Linear VCA, again for different signals.

Specifications

Effective CV Range for CV-1, CV-2 and CV-3 is 0 to +5V with attenuverter fully clockwise or 0 to -5V with attenuverter fully anticlockwise.
Maximum permissible CV Range for CV-1, CV-2 and CV-3 is -12 to +12V
IN 1A to IN 3B Input levels -5V to +5V, levels up to +/-10V are possible however some clipping may occur.
Module Width: 14hp
Module Depth: 26mm (Including power lead)
Current Usage: 80mA Positive, 72mA Negative

Notes: The Tone Science Triple Cross module is a design collaboration between electronic musician/composer Ian Boddy and AJH Synth.

It features three independant cross fader and panner channels, and it can be used with both audio and CV signals. Each of the channels can be configured in one of four different ways:

1) One In, One out Linear VCA

2) Two in, One out crossfader

3) One in, Two out panner,

4) Two in, Two out cross fader & reversing panner combined.

Audio rate modulation can also be used on the CV inputs to create Ring modulation and Cross modulation type sounds. Each channel has a dedicated Fade control, CV input, and CV Level attenuverter. These can be used together to bias incoming CV signals.

The L1 and L2 outputs from channels 1 and 2 are normalised to channel 3's inputs, which also have their own level controls to balance incoming signals. This allows very interesting, complex fading and panning between four different input sources, to either Mono or Stereo outputs..

The Triple Cross is very versatile, yet relatively simple to understand and use. However, as they say "knowledge is power", so do spend a little time reading about how to configure the channels in the four different modes, and how to combine all three channels together to create a super-powerful Four to Two to One cross fader.
Each of the three channels can be configured in four different ways, and all three can be used simultaneously. They do not all have to be in the same mode, so we could for example use channel 1 as a cross fader, channel 2 as a Panner for completely different signals, and channel 3 as a Linear VCA, again for different signals.

Specifications

Effective CV Range for CV-1, CV-2 and CV-3 is 0 to +5V with attenuverter fully clockwise or 0 to -5V with attenuverter fully anticlockwise.
Maximum permissible CV Range for CV-1, CV-2 and CV-3 is -12 to +12V
IN 1A to IN 3B Input levels -5V to +5V, levels up to +/-10V are possible however some clipping may occur.
Module Width: 14hp
Module Depth: 26mm (Including power lead)
Current Usage: 80mA Positive, 72mA Negative

Notes: Ultra-versatile LFO module with tap tempo, internal/external clock support, 16 different waveforms and a clever Waveform Twist option, allowing a PWM-style effect.

Supplier's Notes:
The MiniMod Tap Tempo VC-LFO is a 12HP wide LFO with a huge range of useful features including Tap Tempo and internal / external clock control.

Sixteen different waveforms are available over two banks and an eight way rotary switch and Bank switch allow easy waveform selection.

The unique Waveform Twist function allows PWM like duty cycle variation to be applied to fifteen of the waveforms.

CV controllable multiply function - with this we can double, treble, quadruple or half the LFO rate, so that we can vary the modulation frequency but still keep it relative to the tempo of the track.

Large modulation range from 0.05Hz (one cycle every 20 seconds) to 50Hz

Random stepped voltages (similar to S&H) and also a very useful random sloped voltage outputs are also available.

Voltage control is implemented for all functions, including waveform selection and exponential control of modulation frequency

Bipolar and Unipolar outputs are available simultaneously and the built in VCA allows easy control of the modulation level of both outputs.

Module Width: 12hp
Module Depth: 26mm (Including power lead)
Current Usage: 35mA Positive, 25mA Negative

Notes: The Low Fat is a new 2hp Eurorack module by AJH Synth, it's a High Pass filter, with frequency control by either manual pot, and/or external CV with attenuator. It's intended to compliment other filters, particularly low pass VCF modules, in practical tasks such as removing excessive low frequencies, for example when the bass is swamping a mix. It can be switched between 6dB (1 pole) response and 12dB (2 pole) response.

By patching a CV signal to the FCV input it can be voltage-controlled and used musically as with any other VCF. When used in conjunction with a LP filter it forms a fully customisable band pass filter, allowing the range of passbands to be cherry-picked. Feeding in a 1V/Oct pitch CV and setting the FCV pot to a suitable level allows it to track an incoming pitch CV, so the amount of High Pass filtering remains constant as the pitch of the incoming VCOs traverse up and down the frequency range. This can be particularly useful in creating percussive sounds, such as snares and hats, but also on sequenced bass lines. Since it is only 2HP it's a great way to occupy one of those frustrating gaps in your eurorack modular case with something that is deceptively useful, and adds another dimension to the classic bass monster that is the Transistor Ladder Filter.

Dimensions:
2 HP
26 mm deep

Current Draw:
9 mA +12V
12 mA -12V
0 mA 5V

Notes: ***B-STOCK: Box opened, product unused & in perfect condition***


This has two LFOs, each with variable waveshape from Saw to Triangle to Ramp waveforms, or variable Pulse width on the Square wave output. LFO 1 has the addition of a low range and a Sync input. The nominal maximum frequency of the LFOs when in Triangle shape is 20Hz, but under certain combinations of settings they will go much higher, well into audio range.

Also included is a DC coupled VCA, the input of the VCA is normalised to the output of LFO 2, so a 0 to +5V input to the VCA CV input gives control of the LFO waveform amplitude. It can also be used as a stand alone VCA.

This module is very useful for controllers such as the Waldorf KB37 where the modulation wheel gives out 0 to +5V, this can be routed to the VCA CV module so the level of the modulation waveform can be easily controlled. This makes it very easy to add VCO vibrato or filter 'wah' with control of modulation amount from the modulation wheel or other controller.

Notes: The Tone Science Chance Delay is a unique concept in Eurorack modules as it combines chance and randomness, with pulse delay and pulse conditioning. It is a collaboration between electronic musician/composer Ian Boddy and AJH Synth.

It can perform as a Chance generator, but is also capable of pulse stretching for Trigger to Gate conversion, pulse shortening for Gate to Trigger conversion, Gate Delay, Sub Bass Generation and also "divide by n" clock division.

There is a wide range of control and all functions can be operated manually from the front panel or can be automated using external CV voltages. Chance can range between 0 to 100%. The Gate out can be delayed by anywhere between from 0.5mS to 30 Seconds, and the output Pulse length can also vary from 0.5mS to 30 Seconds.

The TRIG push button allows manual triggering of pulses, also determined by the Chance control, and a green LED shows the output pulse status.

Includes a handy "Gate pass through" mode; when the Length control is set to zero the incoming pulse or trigger will still be determined by the Chance and Delay controls, whilst the outgoing gate length will be the same as the incoming gate length.

Compact 8hp form factor and very low power consumption make this an excellent addition to any Eurorack system.

Key features:

Chance, Gate Delay time and Pulse Length can all be set manually or controlled using external CV voltages.

The 'TRIG' push button allows manual triggering, and Chance will be applied to any manual triggering too.

Fast processing allows operation into the lower audio range, so it can perform sub bass generation on drone type sounds. In this mode the Length pot (or an external Length CV) can be used to change the PWM of the output waveform.

After the initial trigger pulse has been acted on, further incoming pulses are ignored until the current cycle has finished. This useful feature allows it to perform "divide by n" division on gate pulses, so it can be used for clock division, and the delay function can be used to add a "swing" away from the rhythm.

Gate pass through mode - if the Length pot is set to zero, then the incoming gate length is preserved, so in this case the gate has Chance and Delay time applied to it, but the outgoing gate length is the same as the incoming gate length.

By setting Chance to 100% and Delay to zero (0.5mS) it can be used as a Gate to Trigger converter, or a Trigger to Gate converter, depending on the Pulse length set with the LENGTH control. We can also use an external Length CV to shorten or increase the length of the output pulse in real time.

Fast and slow ranges for both DELAY time and PULSE length - Fast range is 0.5mS to 2 Sec and Slow Range is 2 Sec to 30 Sec.

Green status LED shows when the output pulse is high.

Front panel controls

Chance Control and CHA Input

This sets the probability of an incoming trigger or gate being passed through to the Pulse Generator circuit. The chance can be set anywhere between 0% and 100%.

The CHA input allows an external control voltage (CV) to control chance remotely. In this mode the Chance control acts as an attenuator for the incoming CV. With the Chance control fully clockwise a CV of +5V will give 100% chance, and lower CV voltages reduce the Chance accordingly. For example, a +2.5V CV will give a 50% chance. The attenuator function is useful if we are using higher control voltages of for example 0 to +10V. If we set the Chance control to the 12 o'clock position it would then halve the incoming CV signal, so in this case +10V will give 100% chance and +5V will give a 50% chance. Negative CV voltages are ignored and will be treated in the same way as zero volts..

Delay Control and DEL Input

This sets the delay amount that is applied to the leading edge of the incoming Gate or trigger received at the IN jack (or a press of the Manual Trigger button), assuming that the "Chance" has been determined to be positive. With the Delay Time switch set to FAST the Delay range will be from 0.5mS to 2 Seconds. With the Delay Time switch set to SLOW the Delay range will be between 2 Seconds and 30 Seconds.

The DEL input allows an external CV voltage to control Delay Time remotely. In this mode the Delay control acts as an attenuator for the incoming CV. With the Delay control fully clockwise a CV of +5V will give the maximum Delay time of either 2 Seconds or 30 seconds depending on the position of the Fast / Slow switch. Lower CV voltages reduce the Delay Time accordingly, so if we apply a CV of zero volts then we will get the minimum Delay time. The attenuator works on any CV patched to the DEL input in the same manner as described for the Chance control.

Length Control and LEN Input

This sets the length, or rather pulse width of the output pulse. With the LENGTH Switch set to FAST the pulse length can be anywhere between 0.5 mS to 2 Seconds. With the LENGTH Switch set to SLOW the pulse length can be between 2 seconds and 30 Seconds.

The LEN input allows an external CV to control Delay Time remotely. In this mode the Length control acts as an attenuator for the incoming CV in the same manner as the Chance and Delay controls.

Setting the Length control to zero invokes "Gate pass through" mode - in this case the incoming gate length is preserved, so the incoming pulse or trigger will still be affected by the Chance and Delay controls, but the outgoing gate length will be the same as the incoming gate length. Turning the Length control slightly clockwise will then invoke the minimum pulse length around control position 1, and further clockwise rotation will increase the Pulse Length as expected. This behaviour also applies to external CV's patched to the LEN input, where a CV of 0V will enable Gate pass through mode.

Fast / Slow mode switches

These switches allow the selection of Fast or Slow mode for Delay time and pulse length, so these ranges can be selected independently for Delay and Length. Fast range is 0.5 mS to 2 Seconds, and Slow range is 2 Seconds to 30 Seconds.

TRIG Switch

The TRIG push button allows manual triggering, and Chance will also be applied to any manual triggering, so depending on the setting of the Chance control, pressing the button has a chance of not doing anything! Holding the button down keeps the incoming gate high for as long as the button is pressed, however this is only really relevant in "Gate pass through" mode - normally only the leading edge of the input pulse is used.

IN - input jack

Connect your input here - a gate, output from an LFO, or even waveforms from a VCO. Any negative component of the input voltage will be ignored, so unipolar or bipolar signals can be used.

OUT - output jack

This outputs the binary pulse (or stream of pulses) that are generated by the Chance Delay circuitry. The gate low level is 0V and gate high level is +6V. The green status LED shows if a pulse is currently being generated.

Module Width: 8hp
Module Depth: 26mm (Including power lead)
Current Usage: 25mA Positive, 6mA Negative

Notes: SHTH - Sample and Hold - Track and Hold

Create stepped outputs using two different classic synthesis techniques, sample & hold and/or track & hold.

Sample & Hold

The top four jacks make up the sample and hold section. There is a noise output that is normalled to the input so you can pass a gate/trig signal into the SAMP input to get a stepped output at the OUT jack.

IN - Signal that will be sampled, normalled to NSE output
SAMP - When high updates the voltage being sent to the output
NSE - White noise output
OUT - The sampled output (freezes the value from the IN jack when the SAMP jack receives a high signal)

Track & Hold

The bottom four jacks make up the track and hold section. There is a walk signal (a randomish meandering voltage) that is normalled to the input. Track and hold is the opposite of sample and hold in that it will pass the IN value to the OUT jack until the TRACK input receives a high gate. While the TRACK input is high it will hold the value. After the TRACK input goes low, it will begin tracking the IN signal again.

IN - Signal that will be tracked
TRACK - When high the value will be held at the output
WALK - A meandering voltage
OUT - The track output (follows IN while TRACK is low, held voltage while TRACK is high)

Notes: A clever hybrid of quad VCA, function generator and more in this chunky module. Four channels of oscillators, envelope generators and VCAs, plus slew, voltage sources and plenty of CV control.

Supplier's Notes:
Four channels of function generator, oscillator, slew limiter, envelope, and VCAs. This module brings the ultimate in flexibility as it can be used as a standalone synth voice, a massive amount of modulation, or a four channel envelope generator w/ mixer. We believe this makes QARV a great first module and a great addition to the largest of systems.

All four channels have the following features:

Uni-polar oscillator mode
Attack and release time control via potentiometer and via input jack
Shape control that controls shape for both attack and release
Output attenuverter
VCAs that normal to each subsequent channel (CH1 -> CH2, etc.). So you can get a mix of all four channels out of the CH4 VCA output (unless you patch a VCA output from an earlier channel)
Channels 1 & 4

Voltage source (CH1 - 5V & CH4 - 10V)
CH1 & CH4 can be switched between IN (slew mode) and TRIG (envelope) mode
RISE and FALL gates. You can use our G&T module to turn these gates into triggers.
Channels 2 & 3:

Bi-polar oscillator mode
Dedicated IN and TRIG jacks (helpful for adding offset to a triggered ENV)
BOTH input jack to simplify patching both the attack and release (also inverts the input to give more standard pitch tracking of higher voltage equals higher pitch)

Notes: Ornament & Crime for 1U Intellijel format

This is functionally identical to the 3U version, just re-oriented to fit in 1U racks. Ornament & Crime is designed by mxmxmx.

The apps currently available in Ornament & Crime:

CopierMaschine is an enhanced version of the original quantising digital emulation of a four stage analogue shift register (ASR).

Harrington 1200 provides basic neo-Riemannian Tonnetz transformations of triadic chords, triggered by the digital (gate/trigger) inputs.

Automatonnetz combines Tonnetz transforms with a "vector" sequencer - it can be both a chord sequencer and a melody sequencer, but not of the usual kind.

Quantermain is a quad pitch quantiser for external voltages, with editable scales; it can do clocked (trigger-driven) quantising, or continuous quantising, with a latency of under 100 microseconds; it also features quad Turing Machines, May-Verhulst logistic maps or byte beats as optional, semi-random, internally generated CV sources.

Meta-Q is a dual-channel quantiser, similar to Quantermain, but also offering scale and note mask sequencing.

Quadraturia is a wavetable quadrature LFO, based on the "Easter egg" in the Mutable Instruments Frames module.

Low-rents is a dual Lorenz and Rossler (strange attractor) modulation generator, partially based on the "Easter egg" in the Mutable Instruments Streams module.

Piqued is a quad voltage-controlled envelope generator, based on envelope generator code from the Mutable Instruments Peaks module, but extending it with voltage control, additional envelope types, including re-triggering (looping) envelopes, additional segment shapes, adjustable trigger delays, and a unique Euclidean "trigger filter" which turns the app into a Euclidean rhythm generator which can output envelopes, not just gate or trigger pulses.

Sequins is a dual-channel step sequencer offering 4 "tracks" of up to 16 steps each; tracks can themselves be sequenced.

Dialectic Ping Pong is a quad bouncing ball envelope generator, based on a hidden mode of the Mutable Instruments Peaks module.

Viznutcracker, sweet! is a quad "byte beat" equation generator, which can be used as an audio source to generate curious but often interesting 8-bit noises and tunes, or which can be clocked by an external source to produce "byte beat" control voltage sequences. "Byte beats" were first described in 2011 by viznut (aka Ville-Matias Heikkila).

Acid Curds is both a chord quantiser (sometimes called a "harmonic quantiser" for external pitch voltages), and a chord progression sequencer.

References is an utility app that outputs specific reference voltages on each channel to help tune or calibrate VCOs and other modules. It also includes a high-precision frequency meter and note tuner, a high-precision BPM (beats per minute) tempo meter, and a closed-loop calibration mode.

Width: 30hp
12V: 85mA
-12V: 10mA

Notes: A full size version of Mutable Instruments Warps. It is functionally identical and will run all firmware that ran on the original.

Width: 10hp
12V: 110mA
-12V: 5mA

Notes: A 22hp version of Mutable Instruments Elements. It is functionally equivalent and therefore runs all firmware options and having identical sound characteristics. This version is great compromise between the tight spacing of Atom and full size original, which is a bit large.

Width: 22hp
12V: 130mA
-12V: 10mA

Module power connector can be connected either way on the module side.

Notes: This is an exact hardware replica of the Mutable Instruments Blades module.

This model uses the original "hard-to-find" opamps, but After Later have substituted V2164M with AS2164D. All of After Later's products use AS2164D and there should be no measurable change in behaviour.

Notes: SHTH - Sample and Hold - Track and Hold

Create stepped outputs using two different classic synthesis techniques, sample & hold and/or track & hold.

Sample & Hold

The top four jacks make up the sample and hold section. There is a noise output that is normalled to the input so you can pass a gate/trig signal into the SAMP input to get a stepped output at the OUT jack.

IN - Signal that will be sampled, normalled to NSE output
SAMP - When high updates the voltage being sent to the output
NSE - White noise output
OUT - The sampled output (freezes the value from the IN jack when the SAMP jack receives a high signal)
Track & Hold

The bottom four jacks make up the track and hold section. There is a walk signal (a randomish meandering voltage) that is normalled to the input. Track and hold is the opposite of sample and hold in that it will pass the IN value to the OUT jack until the TRACK input receives a high gate. While the TRACK input is high it will hold the value. After the TRACK input goes low, it will begin tracking the IN signal again.

IN - Signal that will be tracked
TRACK - When high the value will be held at the output
WALK - A meandering voltage
OUT - The track output (follows IN while TRACK is low, held voltage while TRACK is high)
CC-BY-SA Emelie Gillett

Notes: An 8hp version of the retired Mutable Instruments Grids. It is an identical functional clone, so it will behave in the same was as the full size version, and will run any firmware that runs on the full size version.

Notes: Six segment generator. Looping or one shot envelope generator. Chainable, so it can be expanded to link multiple units.

An exact hardware replica of the Mutable Instruments Stages.

Dimensions
14 HP
25 mm deep

Current Draw
80 mA +12V
20 mA -12V
0 mA 5V

Notes: This is an exact hardware replica of the Mutable Instruments Plaits module.

Width: 12hp
12V: 50mA
-12V: 5mA

Notes: This is an exact hardware replica of the Mutable Instruments Ripples module.

Width: 8hp
12V: 35mA
-12V: 35mA

Notes: Revised take on the excellent Benjolin dual oscillator and filter from Rob Hordijk, featuring the 'rungler' stepped CV generator and extensive output options.

Supplier's Notes:
Benjolin V2 - Rob Hordijk's latest revision of the classic Benjolin. The core of the Benjolin continues to be two oscillators, the rungler (stepped CV generator), and a multimode filter.

This latest revision adds:

Reworked oscillator and filter sections

All levels are adjusted to eurorack standards

Two different steps modes (8/16 and 127)

Double and single clock rate

Externally clockable

External filter input with blend control

Notes: A 6HP version of Mutable Instruments Peaks that adds CV inputs and attenuverters for each of the four parameters.

It can be an ADSR-style envelope generator, an LFO and a drum emulator. By default, the Dead Man's Catch (DMC) firmware will be loaded, which adds the Alt ENV, ALT LFO, ALT Tap, Alt Drum modes below.

The module is calibrated, comes with a power cable, and a one year warranty.

Additional Dead Man's Catch firmware modes:

Basic (original modes):

Envelope
LFO
Tap LFO
Bass/Snare Drums

Alternative ENV:

Double attack envelope
Repeating attack envelope
Looping envelope
Randomized AD envelope
Bouncing ball envelope

Alternative LFO:

Frequency-modulated LFO (folded sine FM)
Frequency-modulated LFO (random FM)
Varying wave shape LFO ( folded sine WS mod)
Varying wave shape LFO ( random WS mod)
Phase-locked loop oscillator

Alternative TAP Mini-sequencer:

ModSequencer
Pulse Shaper
Pulse Randomizer
Turing Machine
Bytebeats

Alternative DRUM:

FM drum Generators
Randomized bass and snare drum generators
Randomized high hat

Notes: This is a buffered/active mult with LED indicator. You get two channels of 1 to 3 multiples within a 2HP module. The output of channel 1 is normalled to channel 2 so it can also be treated as a 1 to 6 multiple as well.

Active vs Passive mults:

With a passive mult you are effectively just plugging multiple things into the same jacks. This will often cause some voltage drop in each of the signals. With an active (or buffered) mult you will not get any voltage drop from the original signal.

Comes with a black and gold panel, power cable and one year warranty.

Usage note:

The red stripe of the power ribbon cable goes towards the top of this module.

Notes: Mult 1U Intellijel Format

This is a buffered/active mult with LED indicator. You get two channels of 1 to 3 multiples within a 2HP module. The output of channel 1 is normalled to channel 2 so it can also be treated as a 1 to 6 multiple as well.

Active vs Passive mults:

With a passive mult you are effectively just plugging multiple things into the same jacks. This will often cause some voltage drop in each of the signals. With an active (or buffered) mult you will not get any voltage drop from the original signal.

Comes with a black and gold panel, power cable and one year warranty.

Usage note:

The red stripe of the power ribbon cable goes towards the top of this module.

Notes: Popple is an 8hp multimode stereo filter based on the Mutable Instruments Ripples V1 filter section. Popple maintains the buttery smoothness of Ripples filter while giving you two separate audio paths. The audio paths share a resonance, control, a frequency cutoff control, resonance CV input, and a v/oct cutoff CV input. Each channel then has it’s own cutoff CV input with attenuverters (which are normalled to a 2.5V signal).

Popple will also self-oscillate at high resonance settings, when coupled with the v/oct CV control, it can also act as a dual sine wave oscillator.

Notes: The full power of Mutable Instruments Elements packed into 18hp. It features jack lights that can be turned on/off via a jumper on the back. This module comes loaded with the most recent firmware, with the new Chords mode that unlocks a whole new world of potential.

Based on open source designs by emilie gillet under Creative Commons (CC-BY-SA) license.

Width: 18hp
12V: 130mA
-12V: 10mA

Notes: Third-party clone of the open-source Mutable Instruments Plaits oscillator/sound source. All the same functionality in a compact 8hp format with full-size knobs for the key functions.

Supplier's Notes:
Functionally identical clone of the Mutable Instruments Plaits. Beehive strikes a nice balance between size, reducing 12hp down to 8hp, and playability by offering full size knobs for the four main functions. Beehive also retains the same depth of the original module at 25mm. This module uses After Later's new aluminum knobs which have a nice non-slip texture and allow for more finger space over the standard 1900H Davies knobs.

Notes: Cara (uMarbles)

This is a new build of a micro version of Mutable Instruments Marbles. It retains all the functionality of the original full-sized module but takes up less space. It comes with jack lights that can be disabled via a jumper on the back.

These modules use tall bushing potentiometers to offer a more stable feel. You can see the difference in the last picture. You will feel much less wiggle with the tall bushing (left) than with traditional trimmer style (right).

The module is fully assembled, tested, and calibrated. The calibration is done with a 6.5 digit multimeter, itself recently calibrated, to ensure you get the highest accuracy from your module. Eurorack power cable included.

Width: 10HP
Depth: 34mm
Height: 3U
Power Consumption: +12V: 80mA -12V: 20mA

Notes: DVCA

DVCA is a dual VCA based on the Mutable Instruments Veils. It features two separate voltage-controlled amplifiers, both with a gain and a response curve potentiometer, that is variable from linear to exponential. The outputs are normalized, so when no patch cable is present on output 1, output 2 will contain both signals, allowing the module to be used as a mixer. Several DVCAs can be daisy-chained for voltage-controlled mixer operation. It comes with jack lights that can be disabled via a jumper on the back.

These modules use tall bushing potentiometers to offer a more stable feel.

The module is fully assembled and tested. Eurorack power cable included.

Notes: Enigma Expander for micro Turing Machine (Alan)

An expander for After Later's Alan module (a smaller version of the Turing Machine) that enables you to manipulate the stepped CV sequence. This enables you to create a different, yet related sequence to the main Alan output.

The module comes with the required cable to connect to the main module. Our black and gold panel is designed to complement Alan, Aftter Later's micro version of the Turing Machine.

The module comes with a 1 year warranty.

Notes: This is a new build of a micro sized Mutable Instruments Plaits called Knit.

These modules use tall bushing potentiometers to offer a more stable feel.

The module is fully assembled, tested, and calibrated. Eurorack power cable is included.

Width: 6HP
Depth: 25mm
Height: 3U
Power Consumption: 12V: 50mA -12V: 5mA

Notes: This is a new build of a Monsoon, which is a variation of Mutable Instruments Clouds with separate CV and controls for the 4 "blend" functions. The 4 LEDs on the sliders indicate incoming control voltage for the 4 main parameters. The button which was used to select blend parameters now simply switches what the 4 LEDs display (audio input monitoring or monitoring the 4 blend amounts.) Parasites 2.01 firmware is loaded by default. Alternative firmware can be loaded by request.

The module is fully assembled, tested, and calibrated. Eurorack power cable is included.

Width: 12HP
Depth: 22mm
Height: 3U
Power Consumption: +12V:120mA -12V:10mA

Notes: Morcom Expander for micro Turing Machine (Alan)

An expander for After Later's Alan module (a smaller version of the Turing Machine) that exposes the pulse outputs from the main Alan module. You get 7 seven random outputs and then 4 that are derived from other 7 outputs. When 1 and 2 are high then the 1+2 outputs is high. You can get some great rhythmic effects using these in conjunction with the main stepped CV output.

The module comes with the required cable to connect to the main module. The panel is designed to compliment Alan, After Later's micro version of the Turing Machine.

The module comes with a 1 year warranty.

Notes: nRings

This is a new build of a micro version of Rings from Mutable Instruments. MicroRings, also called NanoRings, retains all the same functionality as a full-size Rings module.

The module is fully assembled, tested, and calibrated. Eurorack power cable is included.

These modules use tall bushing potentiometers to offer a more stable feel.

Notes: This is a brand new build of a JakPlugg designed Pachinko, which is a micro version of Mutable Instruments Marbles. It retains all of the functionality of the original but takes up less space (12HP) than the original Marbles (18HP).

The module is fully assembled, tested, and calibrated. The calibration is done with a 6.5 digit multimeter, itself recently calibrated, to ensure you get the highest accuracy from your module.

The panel is a custom black After Later Audio panel that offers metallic gold accents.

The module comes with a power cable and a 1 year warranty.

Notes: Pique (uPeaks)

Pique is a micro version (4HP) of the popular Peaks module from Mutable Instruments. It can be an ADSR-style envelope generator, an LFO and a drum emulator.

The module is calibrated, comes with a power cable, and a one year warranty.

Notes: Pique (uPeaks) 1U Intellijel Format

This is a 1U (Intellijel format) version of the Pique module which is based on the popular Peaks module from Mutable Instruments. It can be an ADSR-style envelope generator, an LFO and a drum emulator.

The module is calibrated, comes with a power cable, and a one year warranty.

Notes: This is where Storm and Monsoon meet to create the latest improvements on the original Clouds design. With Typhoon you get all of the features of Storm combined with sliders and layout of Monsoon in 16hp. Typhoon runs the SuperParasites firmware, so no more having to swap between Parasites and Kammerl firmware options. Some of the notable features are:

Dedicated blend controls for Feedback, Panning, Mix, and Reverb (similar to Monsoon)

All eight modes from Parasites and Kammerl

Stereo VCAs

input/output mutes

Exponential and linear pitch controls

Universal CV routing and random CV signals

Comes with an exclusive black and gold panel, power cable and one year warranty.

Notes: uBurst

This is a new build of the micro version of Mutable Instruments Clouds. The module retains all the functions of the original Clouds, taking up significantly less rack space.

These modules use tall bushing potentiometers to offer a more stable feel.

The module is fully assembled, tested, and calibrated. Eurorack power cable is included.

Notes: uO_C

This is a new build of Micro Ornament & Crime, a variant of the popular Ornament & Crime designed by mxmxmx. The firmware is Stock by default.

The module is fully assembled, tested, and calibrated. The calibration is done with a 6.5 digit multimeter, itself recently calibrated, to ensure you get the highest accuracy from your module. Eurorack power cable included.