M-Audio Transit experiments

[Stefan Ehmann]

I was trying to get my M-audio Transit to work today.

Basically it should be a standard USB audio device, but it needs to load a 
firmware first.

For linux, there's madfuload available here:
http://usb-midi-fw.sourceforge.net/

After modifying a few lines (taken from libusb), the firmware seemed to be 
downloaded correctly.

It seems that you need to issue a reset so that the device gets recognized. 
libusb hasn't implemented this, so I tried un/reloading usb modules which 
seems to work. Any pointer on how to do this properly would be appreciated.

In dmesg I get:
uaudio0: <M-Audio Transit USB, class 0/0, rev 1.10/1.00, addr 2> on uhub2
uaudio0: ignored audio interface with 2 endpoints
uaudio0: ignored audio interface with 2 endpoints
uaudio0: ignored setting with type 8193 format
uaudio0: ignored setting with type 8193 format
uaudio0: audio rev 1.00

/dev/sndstat says
pcm1: <USB Audio> on uaudio0
FreeBSD Audio Driver (newpcm: 32bit)
Installed devices:
pcm0: <Intel ICH4 (82801DB)> at io 0xe0100c00, 0xe0100800 irq 11 bufsz 16384 
kld snd_ich (1p/1r/1v channels duplex)
pcm1: <USB Audio> at ? kld snd_uaudio (1p/1r/1v channels duplex default)
        mode 1:(output) 2ch, 24/24bit, pcm, 48001-96000Hz
        mode 1:(input) 2ch, 24/24bit, pcm, 48001-96000Hz
        mode 2:(input) 2ch, 24/24bit, pcm, 8000-48000Hz
        mode 3:(input) 2ch, 16/16bit, pcm, 8000-48000Hz

Something seems to be wrong, since I mostly hear noise as output (with faint 
artifacts of what it should sound like).

I'm pretty much stuck here for now.

This is on i386/CURRENT. More info can be provided if needed.

Stefan