From: Kevin Puetz <puetzk@iastate.edu>
To: Friedrich Ewaldt <friedrich.ewaldt@gmx.de>,
Benny Sjostrand <gorm@cucumelo.org>,
alsa-devel@lists.sourceforge.net
Subject: Re: Re: Phase Reversal on Santa Cruz (cs46xx) => XFire too
Date: Tue, 3 Dec 2002 17:45:48 -0600 [thread overview]
Message-ID: <200212031745.48194.puetzk@iastate.edu> (raw)
In-Reply-To: <3DED2F26.2070805@gmx.de>
On Tuesday 03 December 2002 16:24, Friedrich Ewaldt wrote:
> Hi Benny,
w00t!
it seems that volumes 0-0x7fff ramp up volumes, then 8000-ffff go back down...
but with opposite phases. So...
--- alsa-cvs/alsa-driver-0.9.0rc6cvs20021202/alsa-kernel/pci/cs46xx/dsp_spos.h
2002-11-24 19:52:17.000000000 -0600
+++ modules/alsa-driver/alsa-kernel/pci/cs46xx/dsp_spos.h 2002-12-03
17:27:10.000000000 -0600
@@ -215,7 +215,7 @@
static inline void cs46xx_dsp_scb_set_volume (cs46xx_t *
chip,dsp_scb_descriptor_t * scb,
u16 left,u16 right) {
- unsigned int val = ((0xffff - left) << 16 | (0xffff - right));
+ unsigned int val = (left << 16 | (0xffff - right));
snd_cs46xx_poke(chip, (scb->address + SCBVolumeCtrl) << 2, val);
snd_cs46xx_poke(chip, (scb->address + SCBVolumeCtrl + 1) << 2, val);
and it sounds correct (for CD analog passthru and PCM at least).
(note - you'll need to open alsamixer and adjust the DAC volume before the
'fix' works, I haven't found where it gets programmed on driver load.
Now, I have no idea if this is correct, if I just broke SPDIF (no reciever),
rear speakers (ditto, I don't have any) but it fixes my case anyway, so
that's a start. If anyone can test more of these cases, that might be good.
Throwing it out before I head out here for a few hours, in the hope that it
will cause some insight :-)
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next prev parent reply other threads:[~2002-12-03 23:45 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200211170056.11190.puetzk@iastate.edu>
2002-11-17 22:52 ` Phase Reversal on Santa Cruz (cs46xx) Kevin Puetz
2002-11-18 5:01 ` Benny Sjostrand
2002-11-18 4:41 ` Kevin Puetz
2002-11-18 14:30 ` Michael Alan Dorman
2002-11-18 18:46 ` Kevin Puetz
[not found] ` <200211182300.16367.gte733z@prism.gatech.edu>
2002-11-19 6:29 ` Kevin Puetz
[not found] ` <200211190228.09930.gte733z@prism.gatech.edu>
2002-11-19 11:32 ` Kevin Puetz
2002-11-22 0:09 ` Benny Sjostrand
2002-11-22 15:35 ` Kevin Puetz
2002-11-23 0:00 ` Benny Sjostrand
2002-11-24 13:12 ` James Courtier-Dutton
2002-12-03 22:24 ` Re: Phase Reversal on Santa Cruz (cs46xx) => XFire too Friedrich Ewaldt
2002-12-03 23:45 ` Kevin Puetz [this message]
2002-12-04 8:52 ` Benny Sjostrand
2002-12-05 11:48 ` Friedrich Ewaldt
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