[2.6.3] snd_intel8x0: playing to fast

[2.6.3] snd_intel8x0: playing to fast

[Luca]

Hi,
I'm using linux 2.6.3 with alsalib 1.0.2c. When using alsa output plugin
of XMMS or mplayer the song is played too fast. Using OSS emulation
works fine.

This is from bootlog:

intel8x0_measure_ac97_clock: measured 49482 usecs
intel8x0: clocking to 48000

And this is the sound card (chiset is SiS740):

00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS] Sound Controller (rev a0)
        Subsystem: Asustek Computer, Inc.: Unknown device 1653
        Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
        Latency: 32 (13000ns min, 2750ns max)
        Interrupt: pin C routed to IRQ 9
        Region 0: I/O ports at a800 [size=256]
        Region 1: I/O ports at a400 [size=128]
        Capabilities: [48] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=55mA PME(D0-,D1-,D2-,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

I RTFM and tried passing ac97_clock, but:

a) I don't know what value to pass. Tried some random numbers between
40000 and 49000
b) It doens't make any difference

I also tried without powernow-k7 (the machine is a laptop) but without success.

Any idea?

Luca
-- 
Home: http://kronoz.cjb.net
Do, or do not. There is no try.


-------------------------------------------------------
This SF.Net email is sponsored by: IBM Linux Tutorials
Free Linux tutorial presented by Daniel Robbins, President and CEO of
GenToo technologies. Learn everything from fundamentals to system
administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click

Re: [2.6.3] snd_intel8x0: playing to fast

[Måns Rullgård]

Luca <kronos@people.it> writes:

> Hi,
> I'm using linux 2.6.3 with alsalib 1.0.2c. When using alsa output plugin
> of XMMS or mplayer the song is played too fast. Using OSS emulation
> works fine.
>
> This is from bootlog:
>
> intel8x0_measure_ac97_clock: measured 49482 usecs
> intel8x0: clocking to 48000

Make sure the programs are using device "default" or "plughw:0,0" (or
whatever device numbers you like).  If the programs can't be persuaded
to do that they are buggy.  Well, those two are buggy anyway.

-- 
Måns Rullgård
mru@kth.se



-------------------------------------------------------
This SF.Net email is sponsored by: IBM Linux Tutorials
Free Linux tutorial presented by Daniel Robbins, President and CEO of
GenToo technologies. Learn everything from fundamentals to system
administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click

Re: Re: [2.6.3] snd_intel8x0: playing to fast

[Luca]

Il Wed, Mar 10, 2004 at 11:08:22PM +0100, M?ns Rullg?rd ha scritto: 
> *This message was transferred with a trial version of CommuniGate(tm) Pro*
> Luca <kronos@people.it> writes:
> 
> > Hi,
> > I'm using linux 2.6.3 with alsalib 1.0.2c. When using alsa output plugin
> > of XMMS or mplayer the song is played too fast. Using OSS emulation
> > works fine.
> >
> > This is from bootlog:
> >
> > intel8x0_measure_ac97_clock: measured 49482 usecs
> > intel8x0: clocking to 48000
> 
> Make sure the programs are using device "default" or "plughw:0,0" (or
> whatever device numbers you like).  If the programs can't be persuaded
> to do that they are buggy.  

mplayer is using hw:0,0.

alsa-init: requested format: 44100 Hz, 2 channels, Signed 16-bit (Little-Endian)
alsa-init: compiled for ALSA-1.0.3
alsa-init: soundcard set to hw:0
alsa-init: pcm opend in block-mode
alsa-init: chunksize set to 1024
alsa-init: current val=16, fragcount=16
alsa-init: got buffersize=65536
alsa9: 44100 Hz/2 channels/4 bpf/65536 bytes buffer/Signed 16 bit Little Endian

It doens't like plugwh:0,0:

alsa-init: requested format: 44100 Hz, 2 channels, Signed 16-bit (Little-Endian)
alsa-init: compiled for ALSA-1.0.3
alsa-init: soundcard set to plughw
alsa-init: pcm opend in block-mode
alsa-init: unable to set periodsize: Invalid argument

Also my .asoundrc was very minimal:

pcm.!default {
        type hw
        card 0
}

ctl.!default {
        type hw
        card 0
}

Now I added:

pcm_slave.sl2 {
        pcm "hw:0,0"
        rate 48000
}

pcm.foobar {
        type rate
        slave sl2
}

But, again, MPlayer refuse to work:

alsa-init: requested format: 44100 Hz, 2 channels, Signed 16-bit (Little-Endian)
alsa-init: compiled for ALSA-1.0.3
alsa-init: soundcard set to foobar
alsa-init: pcm opend in block-mode
alsa-init: unable to set periodsize: Invalid argument

aplay does recognise -Dfoobar (and work even without it).

> Well, those two are buggy anyway.

Yep, it seems so :)
Btw, mplayer from CVS (checked out today) works nicely with -ao alsa1x:

alsa-init: requested format: 44100 Hz, 2 channels, Signed 16-bit (Little-Endian)
alsa-init: compiled for ALSA-1.0.3
alsa-init: got device=0, subdevice=0
alsa-init: 1 soundcard found, using: hw:0,0
alsa-init: pcm opened in block-mode
alsa-init: chunksize set to 1024
alsa-init: fragcount=16
alsa-init: got buffersize=65536
alsa1x: 48000 Hz/2 channels/4 bpf/65536 bytes buffer/Signed 16 bit Little Endian
...
[resample] Changing sample rate to 48000Hz
[resample] Changing sample rate to 48000Hz
[resample] Using linear interpolation.

So my sound card accept sound only at 48000Hz but old mplayer didn't
notice that alsa-lib doesn't accept its request for 44100Hz. Correct?

thanks,
Luca
-- 
Home: http://kronoz.cjb.net
La differenza fra l'intelligenza e la stupidita`?
All'intelligenza c'e` un limite.


-------------------------------------------------------
This SF.Net email is sponsored by: IBM Linux Tutorials
Free Linux tutorial presented by Daniel Robbins, President and CEO of
GenToo technologies. Learn everything from fundamentals to system
administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click

Re: [2.6.3] snd_intel8x0: playing to fast

[Måns Rullgård]

Luca <kronos@people.it> writes:

> Il Wed, Mar 10, 2004 at 11:08:22PM +0100, M?ns Rullg?rd ha scritto: 
>> *This message was transferred with a trial version of CommuniGate(tm) Pro*
>> Luca <kronos@people.it> writes:
>> 
>> > Hi,
>> > I'm using linux 2.6.3 with alsalib 1.0.2c. When using alsa output plugin
>> > of XMMS or mplayer the song is played too fast. Using OSS emulation
>> > works fine.
>> >
>> > This is from bootlog:
>> >
>> > intel8x0_measure_ac97_clock: measured 49482 usecs
>> > intel8x0: clocking to 48000
>> 
>> Make sure the programs are using device "default" or "plughw:0,0" (or
>> whatever device numbers you like).  If the programs can't be persuaded
>> to do that they are buggy.  
>
> mplayer is using hw:0,0.

Bug.

> alsa-init: requested format: 44100 Hz, 2 channels, Signed 16-bit (Little-Endian)
> alsa-init: compiled for ALSA-1.0.3
> alsa-init: soundcard set to hw:0
> alsa-init: pcm opend in block-mode
> alsa-init: chunksize set to 1024
> alsa-init: current val=16, fragcount=16
> alsa-init: got buffersize=65536
> alsa9: 44100 Hz/2 channels/4 bpf/65536 bytes buffer/Signed 16 bit Little Endian
>
> It doens't like plugwh:0,0:
>
> alsa-init: requested format: 44100 Hz, 2 channels, Signed 16-bit (Little-Endian)
> alsa-init: compiled for ALSA-1.0.3
> alsa-init: soundcard set to plughw
> alsa-init: pcm opend in block-mode
> alsa-init: unable to set periodsize: Invalid argument

Bug.

> Btw, mplayer from CVS (checked out today) works nicely with -ao alsa1x:
>
> alsa-init: requested format: 44100 Hz, 2 channels, Signed 16-bit (Little-Endian)
> alsa-init: compiled for ALSA-1.0.3
> alsa-init: got device=0, subdevice=0
> alsa-init: 1 soundcard found, using: hw:0,0
> alsa-init: pcm opened in block-mode
> alsa-init: chunksize set to 1024
> alsa-init: fragcount=16
> alsa-init: got buffersize=65536
> alsa1x: 48000 Hz/2 channels/4 bpf/65536 bytes buffer/Signed 16 bit Little Endian
> ...
> [resample] Changing sample rate to 48000Hz
> [resample] Changing sample rate to 48000Hz
> [resample] Using linear interpolation.
>
> So my sound card accept sound only at 48000Hz but old mplayer didn't
> notice that alsa-lib doesn't accept its request for 44100Hz. Correct?

So it seems.

-- 
Måns Rullgård
mru@kth.se



-------------------------------------------------------
This SF.Net email is sponsored by: IBM Linux Tutorials
Free Linux tutorial presented by Daniel Robbins, President and CEO of
GenToo technologies. Learn everything from fundamentals to system
administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click