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Linux ALSA driver for D.O.Tec's EXBOX.UMA

About the hardware

D.O.TEC® EXBOX.UMA is a 32 channel USB audio device with four ADAT ports and an optical MADI port.

For details, see http://www.directout.eu/en/products/exbox.uma.html

Driver status

Think alpha! PCM and MIDI streams work, but the integration needs to be improved. If you want to contribute to make it more user-friendly, that would be much appreciated.

How do I use this?

  • Clone this repository
  • make install (as root)
  • User alsamixer or amixer to enable streaming
  • Start your audio application, e.g., jackd

But how do I change the routing/mixer?

You send the right sysex message to the MIDI-Out port. Any MIDI tool would do, from amidi to PD. I'm working on an shiny remote control app to generate this message for you to make it more pleasant. Drop me a mail if you want to learn about the protocol.

How do I set the sample rate?

You send the right sysex message to the MIDI-Out port. Same as above. If you only need 44.1/48kHz, the driver has built-in support that don't require sending a sysex command. Just request 44.1kHz or 48kHz in your application.

The yet-to-be-written remote control app will allow fort 2FS and 4FS as well, which gives you up to 192kHz.

Can I help?

Yes, please. Use this driver, test it, drop me a line. Extra credits if you send pull requests. If you want to work on the remote control app and need the protocol, drop me a line.

What's that remote control app that you keep talking about?

From a driver's perspective, the device is pretty straight-forward: except for streaming on/off, there's little to set in registers. All the magic happens by sending MIDI messages to the box. I have the protocol spec, somebody just needs to implement it.

I've started writing a Go application that ideally bridges between MIDI and HTML5. Instead of using a native toolkit like GTK or Qt, the UI could be written in HTML5. So if you know some fancy CSS or JS, I'd like to hear from you. We'd need a matrix router (144x128), a multi-channel mixer and a settings menu/card.

The Go application would act as a webserver that serves the static HTML and also translates messages from/to MIDI.

If you have a better idea, I'm all ears.

How do I contact you?

Like always: adi@drcomp.erfurt.thur.de

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Linux ALSA driver for D.O.Tec's EXBOX.UMA

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