Electronic Drum Synthesizer

The circuit below consists of two “twin-T” oscillators set to a point below oscillation. To set the circuit into oscillation, we can touch the Touch Pad. Here is the schematic diagram of the circuit:

By touching the pads in different ways and a whole range of effects are available will produce different effects. Before oscillation, the two 25k pots are adjusted to a point. We can produce a drum roll by shifting a finger rapidly across adjacent ground and drum pads. [Source: talkingelectronics.com]