Mailing List Archive

or change myth to use 48kHz and you can then _use_ your SPDIF


best,
Cedar

On Thursday, July 10, 2003, at 03:27 AM, Martin Cosgrave wrote:

>
>
> if you have an nForce-based motherboard and your music seems to be
> playing too
> fast in mythmusic, try passing the option "spdif_status=0" to the
> nvaudio
> module
>
> by default spdif is enabled which forces the audio driver into 48kHz.
> I would
> guess that there is some way to find out the current rate of the
> driver and
> that mythmusic isn't checking it, at least the documentation suggests
> to
> disable spdif if your application makes assumptions about the bitrate.
>
> Martin
>
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> mythtv-users@snowman.net
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On Thu, 2003-07-10 at 11:08, Cedar McKay wrote:
> or change myth to use 48kHz and you can then _use_ your SPDIF
>
>
> best,
> Cedar


I just ran into this tonight. Apparently I hadn't tested MythMusic after
switching over to S/PDIF a few weeks back. MythTV sound is just fine.
MythMusic is a bit fast and high pitched. I swapped out all instances of
44100 with 48000 in cddecoder.cpp. This seemed to make the speed OK, but
the pitch is still messed up.

Anyone know the correct way to fix this? Is there a parameter I can pass
ALSA to force 44100 on S/PDIF? Should I be hacking up Myth further?

ASUS a7n266-vm
ALSA CVS (7/12)

Thanks,
Joe

On Friday 08 August 2003 12:32 am, m0j0.j0j0 wrote:
> On Thu, 2003-07-10 at 11:08, Cedar McKay wrote:
> > or change myth to use 48kHz and you can then _use_ your SPDIF
> >
> >
> > best,
> > Cedar
>
> I just ran into this tonight. Apparently I hadn't tested MythMusic after
> switching over to S/PDIF a few weeks back. MythTV sound is just fine.
> MythMusic is a bit fast and high pitched. I swapped out all instances of
> 44100 with 48000 in cddecoder.cpp. This seemed to make the speed OK, but
> the pitch is still messed up.
>
> Anyone know the correct way to fix this? Is there a parameter I can pass
> ALSA to force 44100 on S/PDIF? Should I be hacking up Myth further?

Try using mythmusic CVS?

Isaac
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> Try using mythmusic CVS?
>
> Isaac

I'm running CVS from 8/6 ~10PM CST. Did I miss any commits yesterday
that would have effect on this?

Thanks,
Joe

----- Original Message -----
From: "m0j0.j0j0" <m0j0@foofus.net>
Date: Friday, August 8, 2003 0:32 am
Subject: Re: [mythtv-users] nForce mobo + mythmusic plays too fast

> On Thu, 2003-07-10 at 11:08, Cedar McKay wrote:
> > or change myth to use 48kHz and you can then _use_ your SPDIF
> >
> >
> > best,
> > Cedar
>
>
> I just ran into this tonight. Apparently I hadn't tested MythMusic
> afterswitching over to S/PDIF a few weeks back. MythTV sound is
> just fine.
> MythMusic is a bit fast and high pitched. I swapped out all
> instances of
> 44100 with 48000 in cddecoder.cpp. This seemed to make the speed
> OK, but
> the pitch is still messed up.
>
> Anyone know the correct way to fix this? Is there a parameter I can
> passALSA to force 44100 on S/PDIF? Should I be hacking up Myth
> further?
> ASUS a7n266-vm
> ALSA CVS (7/12)
>
> Thanks,
> Joe
>


If you're using the ALSA OSS emulation with /dev/adsp, I had the same problem with newer ALSA versions. The SPDIF output was hardcoded in the intel8x0 driver somwhere between 0.9.4 and 0.9.5, and as far as I know, hasn't been changed since. I'm using the CVS version of ALSA from 6/21, with no problems, using the current CVS of MythTV.

If you're using ALSA directly, then it still may be a problem, but I don't know.

Scott

On Friday 08 August 2003 09:13 am, m0j0.j0j0 wrote:
> > Try using mythmusic CVS?
> >
> > Isaac
>
> I'm running CVS from 8/6 ~10PM CST. Did I miss any commits yesterday
> that would have effect on this?

Ah, no. There's code in mythmusic that should be resampling the audio,
though. Might give you a starting point if you want to look there
(audiooutput.cpp, look for the 'needresample' bits).

Isaac
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> If you're using the ALSA OSS emulation with /dev/adsp, I had the same problem with newer ALSA versions. The SPDIF output was hardcoded in the intel8x0 driver somwhere between 0.9.4 and 0.9.5, and as far as I know, hasn't been changed since. I'm using the CVS version of ALSA from 6/21, with no problems, using the current CVS of MythTV.
>
> If you're using ALSA directly, then it still may be a problem, but I don't know.
>
> Scott

Thanks! I'm using OSS emu w/ /dev/adsp. I went to CVS 6-21 (was 7-12)
and everything is working now. No more chipmunk sounding songs.

I'll just have to remember not to update ALSA or, apparently, nVidia
drivers based on other threads.

Joe