BASS DRUM

The core sound is generated by a bridged-T network — a resonant band-pass filter that acts as a damped oscillator when excited by a trigger pulse. Its main frequency is set by the TUNE knob. Envelope generator modulates this network, where DEPTH controls the range of the initial pitch sweep, PUNCH sets its recovery speed, and DECAY determines the overall length of the sound. The character is shaped by the TONE control, a low-pass filter that attenuates the high-frequency attack click, and by the DRIVE circuit with its HARD/SOFT intensity switch, which adds variable saturation.

The CV input allows for external voltage control (0V to +5V) of the main frequency (TUNE), the ACC input (0V to +5V) modulates the accent level, and the GATE input (+5V to +12V) receives the trigger signal. The processed audio is available at the OUT jack.

This design offers versatile sound shaping, suitable for everything from subtle, deep kicks to aggressive, distorted tones.

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