>> >> I'm playing a video in miro and I get:
>> >>
>> >> # lsof|grep speex
>> >> miro.real 9019 user mem REG 8,3 108992
>> >> 28197654 /usr/lib64/libspeex.so.1.4.0
>> >>
>> >> Does this mean dmix is using speex? If so, what else could be causing
>> >> my static problem? I basically hear static whenever dmix is involved.
>> >> If I have mpd resample with libsamplerate, I get no static.
>> >>
>> >> - Grant
>> >>
>> >
>> > Yes, you are using speex.
>>
>> I don't think my defaults.pcm.rate_converter is being obeyed. I
>> switched from "speexrate_best" to "samplerate_best" and also tried
>> removing the definition entirely, but lsof still says whichever
>> program is playing audio is opening the speex file and not the
>> libsamplerate file.
>>
>> I also tried removing speex from the system and speex disappeared from
>> lsof, but the static remained.
>>
>> > I suggest first of all to temporarily leave 'miro' aside - it's a
>> > non-trivial piece of SW which might have its own quirks.
>> >
>> > I suggest to start from very basic 'aplay' with .wav files - just to
>> > make sure ALSA works OK.
>>
>> I can definitely confirm static with aplay .wav files that doesn't
>> exist in mpd. If I don't have mpd bypass dmix I get static there too.
>> Where should I go from here?
>>
>> # lsof|grep aplay
[snip]
>>
>> - Grant
>>
>>
>> > Then, say, 'mplayer' with .flac, .mp3.
>> >
>> > You can try to increase ALSA buffers size, but I do not remember how to
>> > do this, though I remember it was easy.
>> >
>> > Regards,
>> > Sergei.
>>
>
> Then start from very basic things:
>
> 1) choose direct HW output;
> 2) choose sample rate supported by HW - if necessary, resample your
> input file by high quality stand-alone resampler;
> 3) also take care of number of bits if necessary;
> 4) start playing with ALSA buffer size.
>
> For resampling/format conversion you can use 'ecasound' or 'sox'.
>
> Disclaimer: I am not an ALSA developer, so my recommendation are from
> end user point of view.
>
> Regards,
> Sergei.
I added this to /etc/asound.conf:
pcm.!default {
type plug
slave.pcm {
type dmix
ipc_key 1024
slave {
pcm "hw:0"
format S24_3LE
rate 96000
}
}
}
I can see that it works because the 96k LED lights up on the DAC, but
the static remains. I've also tried it in combination with:
defaults.pcm.rate_converter "samplerate_best"
I also tried various values of buffer_size and it caused some skipping
but didn't affect the static at all.
- Grant
------------------------------------------------------------------------------
The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your
production scanning environment may not be a perfect world - but thanks to
Kodak, there's a perfect scanner to get the job done! With the NEW KODAK i700
Series Scanner you'll get full speed at 300 dpi even with all image
processing features enabled. http://p.sf.net/sfu/kodak-com
_______________________________________________
Alsa-user mailing list
Alsa-user@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/alsa-user
