Petal 125B SM Support

[CorvusPrudens]

This pull request adds support for the Petal 125B SM in addition to small QOL improvements.

The testing for this PR consisted of the petal_125b_sm_test.pd file. Tested components include:

• footswitch_1
• relay control
• led1, led2, and led3
• toggle_2 and toggle_3
• knobs 1-3

All these are working as expected. Audio I/O seems perfectly functional as well. Notably, the expression input remains untested. My last expression pedal met a brutal end in a waterlogged basement.

[CorvusPrudens]

Petal125BSM Pure Data support

[beserge]

Documentation

Need documentation. The oopsy documentation was good. I'd copy from there.

Testing

Modified the example to test

• Pot 1,2,3,4,5,6
• toggle 1, 2, 3
• led 1,2,3
• fs 1, 2
• audio IO
• expression

Everything worked!

json

Audio Channels: 2. Not any more! We don't support "1 channel". Maybe a comment somewhere on that would be helpful.

Underscore versions of leds. led_1, aliased as led1. I think we had a similar conversation on the oopsy stuff. Maybe we changed this there and didn't back annotate it here.