[linux-audio-user] MAudio Quattro help

I'm trying to use all 4 input channels on a MAudio Quattro on Fedora
Core 5 running on a Playstation 3 (PPC build of the kernel with some
stuff stripped out).

The final app will just use open() and read() to process the data
directly. In that application it looks like I get 2 copies of the
first 2 channels. I get Channel 0 replicated in Channel 2 with
exactly the same values, and Channel 1 replicated in Channel 3.
(Recording 16 bit at 44.1kHz)

I followed the directions in
http://wiki.linuxquestions.org/wiki/M-Audio_Quattro to setup
.asoundrc. I am trying to debug using just arecord but I can't get it
to do anything

arecord -r 44100 -c 4 -f s16_le -D q4 -d 5 test4.wav

gives me

arecord: xrun:1082: read/write error, state = PREPARED

Any help would be appreciated.

Thanks,
Jim Steed

Here is the relevant part of /proc/bus/usb/devices:

T: Bus=01 Lev=02 Prnt=02 Port=01 Cnt=02 Dev#= 4 Spd=12 MxCh= 0
D: Ver= 1.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=0763 ProdID=2001 Rev= 1.05
S: Manufacturer=M Audio
S: Product=USB Audio Quattro
C:* #Ifs=10 Cfg#= 1 Atr=40 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=00 Driver=snd-usb-audio
I: If#= 1 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
I: If#= 1 Alt= 4 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E: Ad=03(O) Atr=09(Isoc) MxPS= 192 Ivl=1ms
I: If#= 2 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
I: If#= 2 Alt= 4 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E: Ad=85(I) Atr=0d(Isoc) MxPS= 192 Ivl=1ms
I: If#= 3 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=00 Driver=snd-usb-audio
I: If#= 4 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
I: If#= 4 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E: Ad=03(O) Atr=09(Isoc) MxPS= 576 Ivl=1ms
I: If#= 4 Alt= 3 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E: Ad=03(O) Atr=09(Isoc) MxPS= 288 Ivl=1ms
I: If#= 4 Alt= 4 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E: Ad=03(O) Atr=09(Isoc) MxPS= 192 Ivl=1ms
I: If#= 5 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
I: If#= 5 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E: Ad=85(I) Atr=0d(Isoc) MxPS= 576 Ivl=1ms
I: If#= 5 Alt= 3 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E: Ad=85(I) Atr=0d(Isoc) MxPS= 288 Ivl=1ms
I: If#= 5 Alt= 4 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E: Ad=85(I) Atr=0d(Isoc) MxPS= 192 Ivl=1ms
I: If#= 6 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=00 Driver=snd-usb-audio
I: If#= 7 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
I: If#= 7 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E: Ad=04(O) Atr=09(Isoc) MxPS= 576 Ivl=1ms
I: If#= 7 Alt= 3 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E: Ad=04(O) Atr=09(Isoc) MxPS= 288 Ivl=1ms
I: If#= 7 Alt= 4 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E: Ad=04(O) Atr=09(Isoc) MxPS= 192 Ivl=1ms
I: If#= 8 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
I: If#= 8 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E: Ad=86(I) Atr=0d(Isoc) MxPS= 576 Ivl=1ms
I: If#= 8 Alt= 3 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E: Ad=86(I) Atr=0d(Isoc) MxPS= 288 Ivl=1ms
I: If#= 8 Alt= 4 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E: Ad=86(I) Atr=0d(Isoc) MxPS= 192 Ivl=1ms
I: If#= 9 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=snd-usb-audio
E: Ad=81(I) Atr=03(Int.) MxPS= 32 Ivl=1ms
E: Ad=82(I) Atr=02(Bulk) MxPS= 32 Ivl=0ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 32 Ivl=0ms
Received on Sat Mar 24 00:15:02 2007