[alsa-devel] TASCAM US-122mkII

Daniel Mack zonque at gmail.com
Fri Aug 19 13:46:00 CEST 2011

On Fri, Aug 19, 2011 at 1:37 PM, Cyril Hrubis <metan.lists at gmail.com> wrote:
> Hi!
>> > The good news is that I have 122mkII to play with, the bad news is that
>> > it doesn't work with the snd_usb_122l driver.
>> IIRC, the 122mkII implements an entirely different USB protocol
>> compared to its former version. Can you send your "lsusb -v" output?
> Attached.

Ok, nothing that even remotely looks like class compliant descriptors.

> As far as I understand it, there are two endpoints for audio and two for
> MIDI. The MIDI part seems to be initalized fine although I don't have
> any MIDI device to test it.
> And in the log from windows machine the audio part does some
> intialization and then only buch of isochronous transfers.

Hmm, so it seems that our only option is really to look at these
Windows dumps and reverse-engineer the protocol.


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