[linux-audio-user] Re: MAudio Quattro help

Jim Steed jsteed at gedae.com
Mon Mar 26 13:31:46 EDT 2007


One more note.  I didn't install real time kernel patches to my 2.6.16
kernel.  Would not using the real time patches affect the bandwidth
problem from this "cannot submit datapipe" error?

I am able to arecord channels 1 & 2 or channels 3 & 4 but any command
to get all 4 causes this weird error.  Should I just give up on the
Quattro?

Thanks,
Jim

On 3/24/07, Jim Steed <jsteed at gedae.com> wrote:
> More info from my arecord with MAudio Quattro problem...
>
> Checking dmesg I get an error that says
>
> cannot submit datapipe for urb 0, err = -28
>
> I found through google that this means the USB bandwidth has been
> exceeded.  I checked and CONFIG_USB_BANDWIDTH is not set in my kernel
> configuration.  I tried rebuilding with it explicitly set to no and I
> still get the -28 error.
>
> Anyone have any recommendations for getting around this?
>
> Thanks,
> Jim
>
> On 3/23/07, Jim Steed <jsteed at gedae.com> wrote:
> > 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
> >
>


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