[Proposal] MIDI.begin() with no arguments should listen to all channels

[neilmendoza]

Arduino only responds on channel 1 when using MidiUSB.

[krizroring]

MIDI.begin() defaults to only listen to midi channel 1, to listen to all the channels use: MIDI.begin(MIDI_CHANNEL_OMNI);

[neilmendoza]

OK, thanks. The opposite behaviour seems more logical to me, MIDI.begin() listens to all channels and you pass a channel number to filter.

[franky47]

That would seem more logical indeed. However it would be a breaking change, so it would have to wait until v5.

[franky47]

After some consideration, I think listening to all channels by default is a specific use-case for some particular devices.

Having a silent breaking change (all other devices suddenly receiving all channels) seems too dangerous a trade-off, so we'll keep the default to channel 1, and require an explicit opt-in to listening to all channels via MIDI.begin(MIDI_CHANNEL_OMNI).