[linux-audio-user] USB Audio has played but no longer does so.

[Chris Lyon]

/proc/asound/cards reports

0 [rev20                    ]:VIA686A -VIA 82C686A/B rev20
                                      VIA 82C686A/B rev20 at 0xac00, irq 11
1 [UA100                 ]: USB-Audio - UA-100
                                       Roland UA-100 at usb-00:07.2-2

So it looks like something is seen but how do I get aplay to play to the
UA-100?  The VIA card has alway's reported itself but neither windows,
linux or anything else has ever got any life out of it!

so do I use the aplay to select the card even thou, aplay -l doesn't
list it?

Chris



Chris Lyon wrote:

> Dear all,
>
> Roland UA-100 plugged into PC, usbview detects interface.
>
> aplay -l doesn't report any knowledge of the device.
>
> I believe I have loaded the appropriate modules, snd-usb-audio but the 
> system resolutely refuses to make music as it has before. I would 
> include the appropriate modules.conf files to show but this E-mailing 
> machine and the linux box are not connected and I feel cross reading 
> would be a little error strewn.
>
> Can anyone outline a procedure for checking at which point a problem 
> might occur and, if possible, a list of command line utilities that 
> can reveal precisely what components are loaded. Is it possible to 
> load modules incompletly such that a component identifies it's 
> presence but isn't actual functioning. If this is so how does one 
> check the dependancies?
>
> I understand that amix and alsamixer won't recognise the presence of a 
> USB connected audio interface, is this the case?
>
> Any help appreciated.
>
> Chris Lyon
>
>
>