Re: [Alsa-user] Roland AIRA TR-8 USB audio almost works with ALSA . . .

[David W. <reg...@d-...>]

On 07/07/14 07:31, Clemens Ladisch wrote:
> David W. wrote:
>> On 06/07/14 20:48, Clemens Ladisch wrote:
>>> David W. wrote:
>>>> arecord -D hw:1,0 -f S32_LE -c14 -r96000 -t wav test.wav
>>>> Recording WAVE 'test.wav' : Signed 32 bit Little Endian, Rate 96000 Hz, Channels 14
>>>> arecord: pcm_read:2031: read error: Input/output error
>>>
>>> Immediately or after 10 seconds?
>>
>> After about 13 seconds.
> 
> This means that the device did not return any error, but did not
> transfer any samples either.
> 
> Apparently, this device needs some vendor-specific magic to enable
> recording.
> 

Ah. Thanks for the info. It is an unconventional sound device . . .

Have any other USB audio devices that require vendor-specific magic for
functionality been successfully made to work with ALSA (or rather has
ALSA been patched to work with them)?

I'm guessing a start would be to monitor the USB port in a Windows
system between the device and the vendor's device driver.

Then to apply a patch to ALSA enabling the necessary signals - but
perhaps that is beyond the remit of ALSA?


thanks for you time, Clemens,


David.