Motion FM Synthesizer

Published on Sep 2, 2018 Yuki Kuramochi

Note the following is translated via Google Translate. You can find the original Japanese further below.

"Now, popular microcontroller board 'micro: bit'.

By combining this with YAMAHA 's sound board "YMF 825", I found that it is possible to build very creative sounds using the Python language.

The sound is controlled in real time only with the acceleration sensor of the microcomputer board. The point to be aware of is that the YMF 825 is driven by the SPI signal, not the MIDI sound chip. It is control to write parameters (frequency, algorithm, degree of modulation ...) of the FM synthesizer to the registers to the last. In order to control with MIDI signals, you need a driver to convert from MIDI to SPI, but fortunately the sample program has been published, in which the program corresponding to the driver was included.

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