[alsa-devel] Need expert's advice - Fast Track Ultra (8R) dropping samples
clemens at ladisch.de
Wed Oct 6 16:38:34 CEST 2010
Felix Homann wrote:
> Am 05.10.2010 09:21, schrieb Clemens Ladisch:
>> Felix Homann wrote:
>>> Trying to log the value of f reveals that retire_playback_sync_urb()
>>> doesn't seem to be called at all.
>> The entire function or that part of the code?
> The entire function. I had placed a printk at the very beginning of
> retire_playback_sync_urb() whose output doesn't show up.
>> Anyway, please try the patch below, which makes the driver
>> autodetect the feedback format. (The actual format can be
>> seen in /proc/asound/cardX/stream0 while running.)
> Status: Running
> Interface = 1
> Altset = 1
> URBs = 3 [ 57 57 57 ]
> Packet Size = 312
> Momentary freq = 48000 Hz (0x6.0000)
> Interface 1
> Altset 1
> Format: S24_3LE
> Channels: 8
> Endpoint: 1 OUT (ADAPTIVE)
> Rates: 44100, 48000, 88200, 96000
> Data packet interval: 125 us
> Does it tell us anything?
That this device does not use frequency feedback.
What happens when you are recording something and then try to play
something else with a different sample rate? (use arecord/aplay with
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