[alsa-devel] snd-usb-audio: minimum period time as module option?

[Klaus Schulz]

On Mon, Nov 17, 2008 at 8:21 PM, Klaus Schulz <kls.schlz at googlemail.com>wrote:

> Hi folks (probably Clemens).
>
> Would  it be possible to to introduce a module-option variable to
> snd-usb-audio, so that it is possible to switch
> minimum period  from outside
>
> usbaudio.c
>
>     /* set the period time minimum 1ms */
>     /* FIXME: high-speed mode allows 125us minimum period, but many parts
>      * in the current code assume the 1ms period.
>      */
>     snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
>                      1000 * MIN_PACKS_URB,
>                      /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);
>
>
>
> With 125us my EMU USB 0404 and also my PCM2707 devices do sound better.
>
> THX
> \Klaus
>