MFB - Clap-522

Clap-522 generates groovy drum sounds based on filtered noise. VCAs divide the audio material into two sections: The actual, consecutively following claps, which can be edited in quantity, distance and shape plus the continuously subsiding decay phase, which is adjustable in length. Trigger and CV inputs complete the circuit.
Clap-522 responds dynamically to incoming trigger signals. The module’s volume as well as some synthesis parameters are affected by the voltage strength. Besides sequencers and MIDI/CV interfaces, the circuit can also be played using a drum pad, piezo element or dynamic microphone.

Clap-522 is based on circuit designs of the instruments MFB-522 and Tanzbär Lite. For using the drum voice in a modular environment, some extras were implemented.

Available parameters
Filter: Sets the basic tonal character of the Clap-522.
Pulse: Chooses the amount of claps produced with each trigger signal.
Wide: Influences the distance between the claps.
Attack: Adjusts the noise audible between the claps.
Decay: Sets the length of the decay phase.

With the exception of Wide, all parameters come not only with potentiometers, but CV inputs as well.

The dynamic trigger input is adjustable in its sensitivity. At completely clockwise position, 0.1 V are sufficient to activate the module.

Clap-522 supports the serial data protocol M-Bus. With the help of a suitable MIDI/CV interface or sequencer, M-Bus allows the user to send control commands to compatible modules without any patch cables at the front of the modular system. Several circuits can be daisy-chained via small wires. M-Bus works twelve times faster than average MIDI setups. In detail, Clap-522 responds to the following signals:

Trigger and velocity (Note #39; Velocity influences the amount of claps produced per trigger signal.)

• Filter (CC20)
• Attack (CC28)
• Decay (CC36)
• Wide (CC44)