Accordion

Description

A physical model of an accordion. The patch uses a purpose-built external called freereed~ which does fancy maths to model the vibration of a reed. It's polyphonic - 5 voices.

Accordion takes MIDI inputs for frequency (note) and bellows pressure (velocity). If bellows pressure is too high or too low the reed doesn't vibrate. In the middle it makes surprisingly little difference to the level or tone.

Other Controls:

Response - time in ms for pressure to ramp up at the beginning of a note and down at the end.

Reed Q and System Q - represent damping in the reed and the rest of the system. To sound, System Q must be a lot less than Reed Q (try about 1/5 to start with). Then change them to see changes in tone.

Plate thickness: 0 to 1 representing thickness of the plate that the reed sits in. Start about 0.07 and try changing.

Version 1.1: New build of the external freereed~ that should be more stable across machines.