Re: [PATCH] EMU10K1.conf

[Takashi Iwai <tiwai@suse.de>]

At Tue, 06 Jan 2004 12:23:35 +0100,
Dominik 'Aeneas' Schnitzer wrote:
> 
> On Mon, 2004-01-05 at 17:51, Takashi Iwai wrote:
> > "Wave XXX Volume" controls should be zero for multi-channel outputs
> > indeed, because these are volumes of signals duplicated from the front
> > channel to surround/center/lfe channels.
> > locking could be optional, though.
> 
> Hi!
> 
> For me "Wave XXX Volume" controls (using digital out) work like
> intended:
> 
> Wave: Front Speakers Volume
> Wave Center: Center Speaker
> Wave LFE: LFE
> Wave Surround: Rear Speakers
> 
> But setting "Wave Surround Playback Volume" to 0 in the
> EMU10K1.pcm.rear.0 section has the effect that no sound is coming out of
> the rear boxes.

did you raise "Surround Digital Playback" volume?
(not "Surround", it's an entry of AC97).

> And setting "Wave Center Playback Volume" and "Wave LFE Playback Volume"
> to 0 (in EMU10K1.pcm.center_lfe.0) has the effect that no sound is
> coming out of the center and LFE speakers.

also "Center Playback" and "LFE Playback" volumes?

> Generally this means that with the current alsa configuration only the 2
> front speakers have sound (when using the digital out jack).
> 
> By removing the locks and 0-settings, its possible to control the other
> volumes too -> and thus unlocking the other speakers too. :)
> 
> > >  - surround51 was statically bound to the non-digital output and locked
> > > (to the analogue output), so there was no way to get surround sound on
> > > my digital-out.
> > 
> > hmm, i'm not sure about this.  surround51 was designed for outputs
> > from three analog jacks.
> > 
> > what do you get from digital out with surround51?
> 
> With the modified config-file and setting xine to use surround51 I get
> True surround 5.1 sound. I have a 5.1 test-audio file, which I used for
> testig - Its not just duplication of the front speakers signal.
 
the switch of "SB Live Analog/Digital" can be removed if it works for
you.  it was set to make sure the center "analog" jack works.
(in the recent models, the digital out is shared with the center/lfe
jack.)
with my emu10k1 board, i don't get any valid signals over
center/digital jack unless AC3 is played.  it might depend on the
receiver.  perhaps creative has its own protocol?

but, anyway, "Wave Surround" and "Wave Center" don't make sense at
all.  they are volumes of duplicated signals.  the volumes of
surround/center/lfe channels are different mixer elements.

also, if you want to send AC3 via spdif, you should use iec958 (aka
spdif) in xine.


Takashi


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