On Sun, Mar 18, 2012 at 10:17 AM, David Alexander lidxv0n@gmail.com wrote:
Hi.
I bought and would like to get an eleven rack interface to work. It is a usb gutiar amp emulator/audio interface. It is a avid/digi device that normal uses asio vendor specific drivers.
Appologies to all for 2 copies I forgot alsa-devel.
David,
So it should show up when plugged in as a midi device but the audio i/o is typical m-audio almost but not quiet compliant.
so you do need a quirk based on reading the lsusb output above my guess is:
Interface 0 is a DFU firmware upgrade Interface 1 is really custom (perhaps some sort of custom control/management thing tho I would of thought they'd use midi sysex for that) Interface 2 is the midi Interface 3 looks like maybe a usb mixer without a descriptor? but that's a guess. Interface 4 is potentially usb2 audio output Interface 5 is potentially usb2 audio input.
So if you were to look at the fast track ultra quirk building something that can get audio in and out should be straightforward. (ignore the mixer using QUIRK_IGNORE_INTERFACE or whatever the right macro name is)
that said. there is a devil in the detail here... which is..
Transfer Type Isochronous Synch Type Asynchronous Usage Type Implicit feedback Data
on interface 5 indicates this is implicit feedback used for clocking control... of the output on interface 4 This is not supported by the alsa snd-usb driver but work is underway to add support for this usb transfer mode.
Regards
Grant.