Re: [PATCH] emu10k1: add 96Khz support and setting sample rate for direct SPDIF output

[Takashi Iwai <tiwai@suse.de>]

At Tue, 08 Feb 2005 16:31:52 -0500,
Lee Revell wrote:
> 
> On Tue, 2005-02-08 at 20:45 +0100, Takashi Iwai wrote:
> > At Sun, 06 Feb 2005 16:12:43 -0500,
> > Lee Revell wrote:
> > > 
> > > This patch should add support for 96Khz "direct SPDIF" aka "SPDIF
> > > Bypass" (not P16V) playback mode available on the Audigy1 and 2 and
> > > newer SBLives (?).  It lets you bypass the 48khz DSP resampling when
> > > using the card in digital mode.  It also adds 96khz analog playback
> > > support, good for testing but less interesting because it's downsampled
> > > to 48khz.  A new mixer control "Audigy SPDIF Output Sample Rate" is
> > > created, you can choose 44100, 48000, or 96000.  Standard SPDIF
> > > playback, AC3 passthrough (real 96khz playback), and analog playback
> > > (96khz is resampled to 48khz in the DSP) all work with a 16 bit,96khz
> > > wav file.  Only the last was tested due to lack of any SPDIF hardware.
> > 
> > What happens if you play in a non-matching sample rate or a strange
> > rate like 45000Hz?
> > 
> 
> Works fine in analog mode.  I just made a 51000Hz wave file and it
> played fine, sounds exactly like the 48KHz original.  For SPDIF bypass
> mode it would presumably get resampled to 44.1, 48, or 92Khz depending
> on the control setting.

OK, now I applied the patch to CVS.


thanks,

Takashi


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