Hi Clemens,
thanks for the helpful comment.
On Sun, Apr 22, 2018 at 10:45:11PM +0200, Clemens Ladisch via Alsa-user wrote:
> Marc Haber wrote:
> > Is it possible that the USB device is only able to play back at 48 kHz?
>
> Yes, it's possible. Check /proc/asound/cardX/stream0.
[2/4994]mh@fan:~ $ head -n-0 /proc/asound/card*/stream0
USB Sound Device at usb-0000:00:12.0-5, full speed : USB Audio
Playback:
Status: Stop
Interface 1
Altset 1
Format: S16_LE
Channels: 8
Endpoint: 6 OUT (ADAPTIVE)
Rates: 44100, 48000
Interface 1
Altset 2
Format: S16_LE
Channels: 2
Endpoint: 6 OUT (ADAPTIVE)
Rates: 44100, 48000
Interface 1
Altset 3
Format: S16_LE
Channels: 4
Endpoint: 6 OUT (ADAPTIVE)
Rates: 44100, 48000
Interface 1
Altset 4
Format: S16_LE
Channels: 6
Endpoint: 6 OUT (ADAPTIVE)
Rates: 44100, 48000
Interface 1
Altset 5
Format: S16_LE
Channels: 2
Endpoint: 6 OUT (ADAPTIVE)
Rates: 96000
Capture:
Status: Stop
Interface 2
Altset 1
Format: S16_LE
Channels: 2
Endpoint: 5 IN (ASYNC)
Rates: 44100, 48000
[3/4995]mh@fan:~ $
Looks to me like it at least claims to be able to play back at 44.1 kHz.
Any other reason why the DAT deck won't sync if speakertest runs with
rate 44100? Is this likely a sloppy implementation of the Device or a
bug in the driver? I don't have any clue about USB sound and don't know
how intelligent the hardware is and how much of the magic happens inside
the driver.
Greetings
Marc
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