Re: snd-usb-audio : issue sending "set sample freq"

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On 24.04.2013 18:02, Yves G wrote:
> plug out device:
> [ 3647.504041] usb 8-2: USB disconnect, address 4
> 
> 
> plug it again:
> [ 3667.364026] usb 8-2: new full speed USB device using uhci_hcd and
> address 5
> [ 3667.561637] usb 8-2: configuration #1 chosen from 1 choice
> [ 3667.844668] input: Plantronics Plantronics C720 as
> /devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2:1.3/input/input12
> [ 3667.844799] generic-usb 0003:047F:010A.0008: input,hiddev96,hidraw0:
> USB HID v1.11 Device [Plantronics Plantronics C720] on
> usb-0000:00:1d.2-2/input3
> 
> 
> tail -f /var/log/kern.log (redundant, but just in case):
> Apr 24 17:38:40 Lucid-USB kernel: [ 3647.504041] usb 8-2: USB
> disconnect, address 4
> Apr 24 17:39:00 Lucid-USB kernel: [ 3667.364026] usb 8-2: new full speed
> USB device using uhci_hcd and address 5
> Apr 24 17:39:00 Lucid-USB kernel: [ 3667.561637] usb 8-2: configuration
> #1 chosen from 1 choice
> Apr 24 17:39:00 Lucid-USB kernel: [ 3667.844668] input: Plantronics
> Plantronics C720 as
> /devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2:1.3/input/input12
> Apr 24 17:39:00 Lucid-USB kernel: [ 3667.844799] generic-usb
> 0003:047F:010A.0008: input,hiddev96,hidraw0: USB HID v1.11 Device
> [Plantronics Plantronics C720] on usb-0000:00:1d.2-2/input3
> 
> 
> /proc/asound/card1/stream0:
> 
> Plantronics Plantronics C720 at usb-0000:00:1d.2-2, full speed : USB Audio
> 
> Playback:
>    Status: Stop
>    Interface 1
>      Altset 1
>      Format: S16_LE
>      Channels: 2
>      Endpoint: 3 OUT (NONE)
>      Rates: 16000, 48000
> 
> Capture:
>    Status: Stop
>    Interface 2
>      Altset 1
>      Format: S16_LE
>      Channels: 1
>      Endpoint: 3 IN (NONE)
>      Rates: 16000
> 
> 
> I don't have the USB analyzer, Plantronics does. I am in the process of
> building some patched modules for their environments for them to test.
> When playing a 16kHz sample directly on the device (bypassing PulseAudio
> with aplay -D hw:1,0), I get only clicks and static. 

And you're saying that before the firware changed its default from 16000
to 48000, playback @16khz worked ok?

Anyway, I will send in the patch with your "Reported-and-tested-by", as
appearantly, the sample rate switch works ok now.


Thanks,
Daniel


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