Call hwsync of slave PCM on snd_pcm_hwsync() over dmix.
This reduces ocasional output noises, typically seen in xmms and bmp with
multi-threading on SMP/HT systems.
Disabled slowptr of default dmix definition again.
This patch adds a DSP patch to fix an spdif_bug on some Audigy2 cards.
It also does detailed identification of the capabilities of the sound
card so that the patch is only applied to the sound cards that really
need it.
Signed-off-by: James Courtier-Dutton
"default" PCM can be card-specific.
The definition is moved to pcm/default.conf, and read on-demmand via
aliases.conf. The card config can override the default config.
The preamble values can be defined in iec958 plugin configuration.
As default, Z/Y/X=8/4/2 is used. CMI8338 has different values,
so override in its configuration.
0.0.12
Correct interrupt timing. interrupt at end of period,
instead of in the middle of a playback period.
Remove redundent "voice" handling.
0.0.13
Single trigger call for multi channels.
0.0.14
Set limits based on what the sound card hardware can do.
playback periods_min=2, periods_max=8
capture hw constraints require period_size = n * 64 bytes.
playback hw constraints require period_size = n * 64 bytes.
AudigyLS now supports Digital(AC3)/Analog outputs. 5.1 Surround
PLAYBACK. MIC and LINE IN CAPTURE.
The MIC and LINE IN use the AC97 chip.
The AC97 uses the PLAYBACK(Not CAPTURE) controls in alsamixer for
controlling CAPTURE. Then, instead of sending that output to the
speakers, it sends it to the Philips 1361T ADC. This results in high
quality ADC conversion.
E.g. For LINE IN capture, set LINE IN playback volume and unmute it.
Set MASTER volume.
There is a new control for "CAPTURE feedback into PLAYBACK". If one does
not want any feedback, leave it at it's minimum.
Once I have figured out all the controls in the AC97 and what they do
for the AudigyLS, I will rename them so that they make sense to the user.
Please see attached patch files against the current CVS.
Still TODO:
1) Set multiple sample rates.
2) Add a CAPUTRE source switch for switch between "MIC", "Line in",
"SPDIF in", "TAD in", "AUX in" and "What u hear". Currently, one cannot
switch to capture "SPDIF in" or "What u hear", but all the other inputs
are possible via switches in the AC97.
3) Set multiple periods per buffer.
4) MIDI in/out.
5) Cleaner module unload.
