GZD - audio frequency to control voltage

modular synths menu

what is it

This software attempts to find the frequency with the biggest magnitude in an audio-signal. This frequency is then transformed into a control voltage.

The sampling is performed 100x/second so that's the number of notes played per second it can recognize.

It won't work with e.g. a regular musical track of your favorite artist, it is meant for a single instrument.

magnitude? control voltage?

The GZD contraption is meant for eurorack modular synthesizers (Doepfer A100 compatible).

hardware

Required:

The MCP4725 needs to be connected to the I2C pins of the raspberry pi. The VCC to the 5V (should work: the raspberry is the I2C master but if you don't feel safe, use a level shifter). Connect a mono jack 3.5mm socket to the GND/OUT pins of the MCP4725.

software

The software can be found on GitHub.






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