envy24 sound quality problem
kosio.dimitrov at gmail.com
Sat Jan 27 15:28:54 UTC 2007
"spicds_setdvc(ptr->info, 0);" turns on the AK452X De-emphasis filter
for 44.1KHz, which is very very wrong, so "spicds_setdvc(ptr->info,
AK452X_DVC_DEMOFF);" is completely right and without active AK452X
De-emphasis filter the high-frequencies will be present and the
problem is fixed.
thank you, Stefan, well done!
i also made the necessary change to the current code here:
On 1/27/07, Stefan Ehmann <shoesoft at gmx.net> wrote:
> On Thursday 25 January 2007 00:27, Stefan Ehmann wrote:
> > Looks like I've been praising the snd_envy24 driver too much last week.
> > Today I've noticed a very strange problem.
> > Compared to the opensound.com (and winxp) drivers, the fbsd drivers sound
> > less bright.
> I will do some more tests to see if sound really is okay now. But this seems
> to fix it:
> --- envy24.c.orig Sat Jan 27 10:55:06 2007
> +++ envy24.c Sat Jan 27 10:54:24 2007
> @@ -857,7 +857,7 @@
> spicds_setcif(ptr->info, ptr->parent->cfg->cif);
> AK452X_FORMAT_I2S | AK452X_FORMAT_256FSN | AK452X_FORMAT_1X);
> - spicds_setdvc(ptr->info, 0);
> + spicds_setdvc(ptr->info, AK452X_DVC_DEMOFF);
> /* for the time being, init only first codec */
> if (ptr->num == 0)
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