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Notes: Part of the 'Gimme Some' series. Gimme Some Drum....

What does this module do?

This module is a complete mini synthesizer that specializes in making analog kick drum sounds.

This product does not use a "Twin T" approach to make it's drum kick sound. This is using an actual 1v/octave triangle core VCO, and an OTA based VCA. The shaper circuit that converts a triangle wave into a sine wave was brought to the front panel. The shaper knob was calibrated to start its shaping at the beginning of a sine wave, and end with an overdriven square wave.

This parameter is called 'Timbre'.

This product can produce a wide variety of ultra generic analogue kick drum sounds.

Influenced by the Korg ER-1 drum synthesiszer, but laid out in an analogue fashion.

-toggle switches are connected to 'timing' capacitors. You can select decay legnths on the fly.

-Depth Knobs let ou precisely dial in how much punch, and loudness you want.

-Accent input lets you simulate 'Midi' velocity but with a positive CV input signal. This makes the Amplifier go louder in volume.

This is basically a CV input for the VCA circuit.

-POP parameter creates a clicky sounding, short audible pulse.

All the internal circuitry was optimized for drum kick. You really can't goof up and not make a percussive sound.
All you need is a triggering signal.

Internally Pre-Patch Products: OTA Triangle Core VCO + Sine Wave Shaper + Assist Percussion Utility

Dimensions
10 HP
32 mm deep

Current Draw
28 mA +12V
23 mA -12V

Notes: What does this do?

This is a mini analogue synthesizer that produces snare drum sounds. Inspiration was taken from the 5U Cor Synth DR02 module. Only the flow chart was studied and used to create this BLM product. VCV Rack was also used to simulate and test the building blocks.

Most of the circuits contained in this product are from other blue lantern module designs.

Some of the building blocks:

-2 1V/Octave Triangle Core VCO's
-2 Sine Wave Shapers
-4 Envelope Generator
-White Noise Generator
-High Pass Filter
-Tone Filter
-2 VCA's
-Mixer

The goal of this module was to recreate some of the more exotic electronic snare sounds.

You're not getting another Roland 'TR' module with the Gimme Some Snare Drum. All the building blocks contain full analogue circuitry, like OTA chips, and Op-amps. No vintage transistor based (Bridge T Oscillator) circuits are used in this product.

The best description as to what the kind of snare drum sounds this module can produce is something comparable to:

an Electribe Korg ER-1, Simmons Snare Drum, and the Mattel Synsonics.

Dimensions
16 HP
32 mm deep

Current Draw
107 mA +12V
97 mA -12V

Notes: What does this do?

This is a sound generator module with 3 oscillators + noise generator. This module is a complete mini synthesizer that can easily produce snare drum sounds. A 'trigger' signal is patched in order to hit the snare drum. The bottom row contains an internal mixer where you mix in 2 shell generator oscillators, one thud oscillator, and a noise generator.

The Trigger input is level sensitive. Lower voltages will result in quiet snare sounds. You can use this to simulate accent.

The Filter on the 'Impact' signal path was carefully designed just for snare drum tone control. It sounds very nice. It will not self oscillate, but the Q control can go very high in frequency. It has a 12db High pass Filter and a 12db Band Pass Filter. There is CV control for the cutoff and CV control for the internal VCA.

An auxilary audio input has been added to the filter. You can mix external sounds.

The tone of this module is very hollow. It simulates wood like snare sounds.

What this module can not do:
-FM modulation of the internal vco's
-track 1V per octave
-increase the decay legnth of the vco's. 808 like.

This module will always remain in snare land. You can not make it sound like a lead synth. This is a good thing. No menu diving, and the snare is always ready.

History of the design:

The Asteroid Snare drum started out on bread board as a TR 606 snare drum. That design only contains one oscillator, a transistor based noise generator, and a 'clipper' brute vca. It is a nice efficient old design, but it is too simple and boring. I decided to add (2) of the original oscillators, and replaced the noise generator with a digital based noise generator to make sure all production units were alike. The snare drum still was missing fullness, so I designed an addition oscillator called 'thud'. The poor vca from the original design was removing all the additional harmonics, so that was replaced by a OTA based vca, and I added tonal controls to the IMPACT signal, and the THUD signal path.

A 12db analogue filter was recently added in the singal path of the Impact circuit. Audio input was also added, with a static internal HPF on this input. The Aux input will sound metal like by default.

All of this amounts to about 200+ smt parts. Far exceeding the original design.

Dimensions
16 HP
32 mm deep

Current Draw
48 mA +12V
45 mA -12V

Notes: ***B-STOCK: Box damaged, product in perfect working order***


This module gives you all the patterns needed to make percussive on the fly sequences. It is very simple to use; you just patch the trigger outputs to your external modules. There is an internal clock source.

Percussion Sequencer, Euclidean Sequencer

This product is a Gate Sequencer that uses Grids Firmware written by Emilie Gillet.

Width: 12hp
Depth: 1.5", 1 PCB Stack, Skiff Compatible
Current: Current: +25mA, -1mA