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

[Chris Lyon]

I'm sorry that I've obviously phrased this question all wrong.
so I'll try to be a little bit more detailed this time.

I have now installed Mandrake 10.1 on the machine.
and now aplay -l does indeed report the existance of UA-100 card
kscd shows all the typical signs of  playing a cd, it lists tracks, it 
starts counting when play is pressed,
But no sound emerges.
amixer reports no mixer elements, or nothing.

/proc/asound/cards displays an endless stream of
0 [UA100       ]: USB-Audio - UA - 100
                          Roland UA - 100 at usb-0000:00:07.2 - 2, full 
speed

if I try to select a Device with
aplay -D= *****
nothing I type in seems to make any sense to it.
if I try to list pcm devices to plug into the above line with aplay -D 
the results are to say the least incomprehensable.

Where do I go next?  This used to work when I installed 9.2 originally 
but I have been poking & proding for 4 days now and It still desn't 
work. ONce again I apologies for the way I present my questions but I am 
NOT pestering before trying, I am on a last ditch attempt to play a CD 
on a linux box.
I won't bore you with my background, but I have a little involvement in 
the synth, computing and audio field and yet this is now getting way 
beyond a joke.  I have had this playing with Micheal Minns MMUSAUDIO . 
However ALSA seems the way to go for all things Audio and Linux.
So how do you check the signal path in a system? and what do you do if a 
device appears not to be supported by the mixing facilities?

Chris Lyon

Chris Lyon wrote:

> /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
>>
>>
>>
>
>
>
>