Using an Arduino as a MIDI device

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Bill Purvis

30 Nov 2016 30 Nov '16

6:32 p.m.

Anyone on the list know how to persuade an Arduino to look like a MIDI device? I've got it generating MIDI signals via a MIDI breakout unit, but want to connect direct to my PC using the USB. I've got it sending what appear to be valid MIDI messages to /dev/ttyUSB1, but qjackctl doesn't see it as a midi device so it can't connect it. Any useful information would be welcome. Thanks in advance Bill -- +----------------------------------------+ | Bill Purvis | | email: bill(a)billp.org | +----------------------------------------+

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Will Godfrey

30 Nov 30 Nov

6:52 p.m.

On Wed, 30 Nov 2016 17:32:51 +0000 Bill Purvis <bill(a)billp.org> wrote:

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There is code for doing that with the Uno onwards, but it reprograms the USB module itself, which means that afterwards you can only reprogram the processor via the 6 pin connector and a proper programmer. Try here for a start. http://forum.arduino.cc/ -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song.

Hanspeter Portner

7:04 p.m.

On 30.11.2016 18:32, Bill Purvis wrote:

...

Arduino by default enumerates its USB port as a virtual serial line (that's why your device is named /dev/tty*). In order to automatically enumerate its USB port as MIDI, you need a board with a processor that features an on-chip USB controller so it can be reprogrammed to also enumerate as USB MIDI [1]. Alternatively, for Arduinos without on-chip USB, you can simply send your MIDI via the virtual serial line and run a ttyMIDI daemon on your receiving host which will mediate between serial line and ALSA MIDI [2]. [1] https://www.arduino.cc/en/Reference/MIDIUSB [2] https://launchpad.net/ttymidi

Bill Purvis

1 Dec 1 Dec

12:25 p.m.

On 30/11/16 18:04, Hanspeter Portner wrote:

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Thanks, Hanspeter! Two useful links there. I tried searching on the arduino forum, but got fed up after seven pages of completely unrelated messages. ttymidi looks really useful, and works with my current code. I haven't plucked up courage to try MIDIUSB as it messes with the setting of the USB bootloader and I haven't figured out how I'd get out of it if it then decides to refuse further uploads. Maybe it's OK, but I'll postpone that for now. I can always run several copies of ttymidi when I get round to adding further complications to the project. Bill -- +----------------------------------------+ | Bill Purvis | | email: bill(a)billp.org | +----------------------------------------+