At Mon, 10 Mar 2003 23:33:22 +0100,
Frank Barknecht wrote:
> 
> Hallo,
> 
> I have to apologize first for asking a probably totally ignorant
> question, but I really have no clue of ALSA-programming :(
> 
> But I need/want to get Pd running on my Laptop with a Quattro USB for
> the LAD conference next weekend, and this requires, that I somehow
> debug what goes wrong in Pd with ALSA.
> 
> I keep getting the following error, when starting Pd in ALSA mode with
> "hw:0,0" or any other ALSA device (like the ones Patrick set up in his
> .asoundrc on alsa-project.org):
> 
> ALSA lib pcm_hw:454(snd_pcm_hw_start) SNDRV_PCM_IOCTL_START failed:
> Broken pipe

do you see any kernel message?
if the start fails in the pcm trigger callback, usb-audio driver
should show some error message there.


Takashi


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