Lorre Mill

Notes: An interesting creative take on delay from Lorre Mill. The Comb Room combines echo and filtering to create reverb and resonant feedback effects. Banana plug patch points allow you to tweak the signal routing.

Supplier's Notes:
Comb Room

The comb room effect combines a dual delay (room circuit) and a comb filter to make echo/reverb-type sounds and resonant feedback. The comb filter is in the feedback path of the delays. An envelope follower gives movement to either the comb filter or the room circuit. The comb resonance control in conjunction with the comb return control can create self oscillation. The preamp for the 1/4" input has selectable gain of 10x or 40x and a soft clipping characteristic. The comb and room circuits are both built around 1 bit delta-sigma converters. In the case of the delays, the analog to digital conversion is done in the PT2399 echo IC. The comb filter uses a simple and gritty A/D converter built of logic chips and op-amps. Which gives the filter a characteristic sound. Clock noise can be heard at lower frequency settings. Patching the room output to the return will bypass feedback through the filter, allowing all frequencies to echo.

Specs

Banana Patch Points
Banana CV inputs max voltage +/- 8v.
Banana Signal Inputs and Outputs are AC Coupled.

Audio Inputs
1/4" TS instrument input, gain of 2x or 12x
1/8" TRS line input summed to mono

Power Input
standard 12v DC 5.5mm x 2.1mm supplying at least 500mA of current

Audio Outputs
1/4" TS line or intstrument output (selected with push-pin switch)
1/8" TRS line output dual mono

Notes: A lovely creative approach to generative synthesis. Dual voices with triangle/square wave oscillators, shift register and envelopes can be patched via banana cables to create unique grooves and drones.

Supplier's Notes:
Double Knot v3

The Double Knot v3 is a small generative synthesizer with two voices and corresponding sequencers. This instrument has a simple architecture which is capable of a wide variety of sounds, including rhythms and drum patterns or textural and grating noise sounds. The interface is made up of knobs, switches, and banana plugs for patching. The two voices of this device each consist of a triangle/square wave oscillator, a shift register sequencer, an enveloper, and a voltage controlled amplifier. A clock sets the tempo of the shift registers.

The voices of the Double Knot are pre-wired, in a linear chain of functional blocks. The patch points are available to route modulations, influencing the simple linear voices. The game of this device is to investigate the relationships between the elements of the synth using the knobs, switches and patch-points.

FAQ

How many banana cables do I need? and what length?

8 or 10 cables around 12" long is a great start.

Can I patch this with my other synth?

Only what is safe for this synth. The banana ports of this device can handle max +/- 8V at all inputs and outputs assuming at least a 1k output impedance in the other device. The response range of the voltage inputs is ~1.2v - 8V (range of a TL07x powered by 9V).

Is this synth good by itself, or does it rely on other devices to be useful?

Some good sounds can be had using this device and a handful of banana cables.