On 01/10/2013 10:30 PM, shal@email-addr-hidden wrote:
>
>> De: "Hans Wilmers" <hanswil@email-addr-hidden>
>> No luck with this either - fastest one I get is 48000. This
>> corresponds
>> to the output of lsusb, which does not list samplerates over 48000
>> for
>> this device.
>
>
> I have tried different kernel, 3.2 to 3.7.1, vanilla or ubuntu kernel.
>
> The lsusb does not means that you are limited to 48000.
>
> The lsusb provides the "devices descriptor" and a devices descriptors has one or more "configuration descriptor". The kernel chooses one of the "configuration descriptor".
> In your device descriptor (provided directly by the device) there is two possibles configuration descriptons (the bNumConfigurations=2). The first one corresponds to the UAC1 mode in high-speed (this is my one configuration) and so limited to 48000. The second one is the UAC2 mode (the expected mode).
>
> Perhaps the kernel choose the fist good one, so UAC1 .
>
> Can you send the result of cat /proc/asound/USBPre2/stream0 ?
>
Yes, see below.
/ Hans
--------------- /proc/asound/USBPre2/stream0 -------------
Sound Devices USBPre2 at usb-0000:00:1a.0-1.2, high speed : USB Audio
Playback:
Status: Stop
Interface 1
Altset 1
Format: S16_LE
Channels: 2
Endpoint: 6 OUT (ASYNC)
Rates: 8000, 16000, 24000, 32000, 44100, 48000
Data packet interval: 1000 us
Interface 1
Altset 2
Format: S24_3LE
Channels: 2
Endpoint: 6 OUT (ASYNC)
Rates: 8000, 16000, 24000, 32000, 44100, 48000
Data packet interval: 1000 us
Capture:
Status: Stop
Interface 2
Altset 1
Format: S16_LE
Channels: 2
Endpoint: 5 IN (ASYNC)
Rates: 8000, 16000, 24000, 32000, 44100, 48000
Data packet interval: 1000 us
Interface 2
Altset 2
Format: S24_3LE
Channels: 2
Endpoint: 5 IN (ASYNC)
Rates: 8000, 16000, 24000, 32000, 44100, 48000
Data packet interval: 1000 us
--------------------------------------------------------------
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Received on Fri Jan 11 00:15:01 2013
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