Module	Description	Controls & Ins/Outs
	SD88 Snare Drum Module The SD88 is an accurate replica of the TR808 snare drum sound. The module is entirely discrete analogue circuitry, based as closely as possible on the original. The snare sound is made up of two oscillators mixed with filtered noise. The SD88 can produce more than just snare drum sounds. The SD88 has additional controls to change noise decay (Decay) and High Pass Filter cut-off (HPF) on the filtered noise. This enables a wide range of snares, noise hits, and bongo/conga type sounds to be produced.	Inputs: Trigger socket 5-12V Accent socket 0-12V Outputs: 3.5mm audio out 6.35mm audio out Power: +/-12V Controls: Tone, Snappy, Decay, HPF, Level Indicators: Trigger LED Size: 10HP

Use

The trigger input has a range of about 5 to 12V. A trigger pulse of around 1mS is recommended, although the gate output of a synth can be used. A larger trigger pulse will increase the level of the sound (accent the notes). When the accent socket is used, the trigger input socket only triggers the sound and the level of the sound is controlled by the voltage of the CV at the accent socket. The accent voltage can be from another trigger pulse generator, or from an LFO or Envelope. When using for example an LFO, you can have the level changing with the LFO sweep.

The trigger LED will light each time a trigger pulse is received.

Controls

Tone Sets the mix between the 2 oscillators that make up part of the sounds.

Snappy Sets the noise level.

Decay Sets decay time of the noise.

HPF Alters filter cut-off of the noise.

Level Sets output level