Module Description Controls & Ins/Outs
cb88w.JPG (19090 bytes) CB88 Cowbell Module

The CB88 is an accurate replica of the TR808 cowbell sound. The module is entirely discrete analogue circuitry, based as closely as possible on the original.

The sound is made up from 2 square wave oscillators whose pitch can manually be adjusted. To create the cowbell sound though, they are tune close together so they beat.

The CB88 can produce more than just cowbell sounds. By tuning the 2 oscillators to equal pitch a synth sound is produced, which can be tuned to the melodies in your music.

Inputs:
Trigger socket 5-12V
Accent socket 0-12V

Outputs:
3.5mm audio out
6.35mm audio out

Power:
+/-12V, 5V

Controls:
Tune 1, Tune 2, Decay, 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

Tune 1 Tune oscillator 1 up or down

Tune 2 Tune oscillator 2 up or down

Decay Sets decay time

Level Sets output level