[LAD] USB device dmesg error

[Clemens Ladisch]

tom at trellis.ch wrote:
> i'm trying to use a Roland R-26 as audio interface (USB).
>
> I saw it is now officially supported in the alsa-driver repo log

This support is not complete.

Please show the output of "lsusb -v" for this device.

> $ aplay a.wav
> Playing WAVE 'rabe_babe.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
>
> -> there are no errors, but it stays like this (a.wav is a few seconds)
> forever and there is no volume indication "from PC" on the device.
>
> $ arecord -f cd b.wav
> Recording WAVE 'b.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
>
> -> no errors but the file is empty (44 bytes), the device shows active mic
> level "to PC"

I guess this is one of the devices that use implicit feedback
synchronization, which is very buggy in the current driver.  As far as
I know, only Jack works with these devices.


Regards,
Clemens