[alsa-devel] Noise using pulseaudio with ymf724f
clemens at ladisch.de
Wed Sep 14 11:05:34 CEST 2011
Raymond Yau wrote:
> Is 256 frames/period in s16 stereo since the card support mono ,
> stereo , U8 and S16 ,
The hardware uses S16 stereo at 48 kHz internally; everything else is
converted and resampled to that.
> What is the meaning of SNDRV_PCM_INFO_BLOCK_TRANSFER
That the card transfers samples in blocks.
> since the rewind_safeguard of PA server is 256 bytes ?
A block in the native format has 1024 bytes.
> Will this
> help since minimum period time of snd_ymfpci is 5.333ms but
> alsa-pulse plugin announce a lower value 128 bytes (period_bytes_min)
> to the alsa application ?
Doesn't PA assume that the hardware has accurate pointer positions?
Without this, smaller periods do not make sense unless PA can
interpolate from the period interrupts.
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