The CP909 is a one-to-one clone of the original circuit found in Roland's TR-909
drum machine. During the design phase, we created additional features only when
implementation would not compromise the original signature sound, or add excessive
costs. Cloning a circuit that was designed and produced in the 80's was not an
easy task. A variety of obstacles including availability of the original parts, the
modern SMT manufacturing process, the differences in +/-12V Eurorack power
versus the +/-15V of the original 909, and far many more were addressed in the
creation of this module. To learn more about the process of remaking the sound
generators in this series please refer to the BD808 user guide.
Introduction.
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The CP909 is Roland's TR-909 analog clap sound generator adapted for modular
synthesizer use. The front panel contains all of the controls found on the original
TR-909 drum machine, allowing you full control over the sound’s volume levels to
mix with other drums, and accent levels. In addition to those original controls we
have also added the unique TRASH knob, further enhancing this circuit.
About the Making of the CP909.
Let’s get started.
To start using the CP909, just plug a gate signal into the GATE IN, plug the
CLAP OUT to your sound system, set the LEVEL half way and TRASH to max,
pointing at the direction of the 909 dot.
