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You installed foo-yc20: an implementation of 1969 designed Yamaha
combo organ, the YC-20.

It works through the Jack sound server, and works as a soft-MIDI device.

In order to use it, please:
* Have Jack server running.
* Have jack-keyboard (audio/jack-keyboard) running.
* Have QjackCtl (audio/qjackctl) running.
* Run the UI command foo-yc20.
* In QjackCtl, connect:
  * the MIDI input of foo-yc20 to the output of jack-keyboard.
  * the foo-yc20 audio output to speakers through the Jack's 'system'.
* Play the jack-keyboard.
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