[alsa-devel] usbaudio: Support for USB audio v2.0 devices

adelias adelias at freemail.gr
Mon May 3 14:49:05 CEST 2010

On 27/4/2010 5:06 μμ, Daniel Mack wrote:
> On Tue, Apr 27, 2010 at 04:23:48PM +0300, adelias wrote:
>> On 2/3/2010 8:35 μμ, Daniel Mack wrote:
>>> On Tue, Mar 02, 2010 at 11:13:04AM +0200, adelias wrote:
>>>> Thanks to all involved for working on usb audio v2.
>>>> Last night I installed the 20100226 snapshot. I did a little testing
>>>> with my XMOS board using toslink out into may DAC. I tried various files
>>>> ranging 16bit/44110kHz-24bit/192000kHz. The 44110 files had quite a bit
>>>> of static, the higher bitrate files were better. As you stated the
>>>> sampling rate is not correct and be verified by looking at the flashing
>>>> LEDs on the XMOS board. They should flash faster as sampling rate
>>>> increase. In this case no change was observed.
>>> Yes - this is all do be done. The sample rate setting is done with a
>>> different type of class request, which also addresses the interface now,
>>> unlike v1 devices which send that to the endpoint. But that's just one
>>> out of many differences that need to be addressed, and it's still a long
>>> way to go. I'm on it :)
>>> Daniel
>> I upgraded alsa to 1.0.23. The XMOS device is working great with the
>> exception of some mild clicks here and there. Is this a known issue or
>> might it be a problem with my specific configuration?
> What specific configuration are you testing with? As you have such an
> evaluation kit, I believe you're also provided with the XMOS development
> platform - which firmware did you install to the board?
> Daniel

Firmware is on 1v2. I'm not getting clicks on OSX 10.6.2 or Windows 7 
with the ASIO driver.

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