From: Clemens Ladisch <clemens@ladisch.de>
To: Raymond Yau <superquad.vortex2@gmail.com>
Cc: ALSA Development Mailing List <alsa-devel@alsa-project.org>
Subject: Re: Noise using pulseaudio with ymf724f
Date: Wed, 14 Sep 2011 11:05:34 +0200 [thread overview]
Message-ID: <4E706E5E.2020602@ladisch.de> (raw)
In-Reply-To: <CAN8ccibqYPovEn=M9b-x4ZjqM3U9DwKnJtyDUKGoos-C2WBVXg@mail.gmail.com>
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
What's "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.
Regards,
Clemens
next prev parent reply other threads:[~2011-09-14 9:05 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-13 23:09 Noise using pulseaudio with ymf724f Raymond Yau
2011-09-14 9:05 ` Clemens Ladisch [this message]
2011-09-16 1:10 ` Raymond Yau
2011-09-16 7:00 ` Clemens Ladisch
2011-09-17 7:43 ` Raymond Yau
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