MIDI message handling

MIDI message handling

[Thorsten Edelhäußer]

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Hi!

I'm writing a driver for the MARIAN MARC 8 Midi soundcard. Today I
tested some MIDI functionality and get some errors from hydrogen
("unhandled midi message type"). I did some research and got to the
point, that the MIDI alive message (0xfe) should not arrive at the
application. So my question is: Do I have to process the midi messages
by myself before I give it to the alsa "snd_rawmidi_receive" function?
Or is there already some code, which will do it?

If someone is interested here is the project page:
http://sourceforge.net/projects/marc8-driver/ 

Regards,
Thorsten

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Re: MIDI message handling

[Clemens Ladisch]

Thorsten Edelhäußer wrote:
> I'm writing a driver for the MARIAN MARC 8 Midi soundcard. Today I
> tested some MIDI functionality and get some errors from hydrogen
> ("unhandled midi message type"). I did some research and got to the
> point, that the MIDI alive message (0xfe) should not arrive at the
> application.

The Active Sensing message is a valid MIDI message.  This seems to be a
bug in hydrogen.

> So my question is: Do I have to process the midi messages by myself
> before I give it to the alsa "snd_rawmidi_receive" function?
> Or is there already some code, which will do it?

The ALSA framework handles this automatically; your driver is not
required to interpret the MIDI data stream.


Regards,
Clemens