ALSA lib pcm.c:7339:(snd_pcm_recover) underrun occurred

[InsecureSpike]

is anyone else having this issue? is it serious? is there a fix?

i’m running;
h/w: raspberry pi 2 running from flash drive
s/w: latest version

edit:
think I’ll try this later

audio_out_rate=44100
audio_driver=sdl

[kitchuk]

I noticed this error as of recent. Anyone know what causes this?

[sevik]

I had this problem when running mupen64plus. In addition the sound was extremly loud. I fixed it by changing the audio plugin in “/opt/retropie/configs/n64/mupen64plus.cfg”.

# AudioPlugin = mupen64plus-audio-omx
AudioPlugin = “mupen64plus-audio-sdl”

Note: I’m not an expert and I don’t really understand what I’ve done. But so far it works ;-)

[InsecureSpike]

ok, so this IS a known issue!

http://mailman.alsa-project.org/pipermail/alsa-devel/2013-January/058136.html

i think i’s just a search now of a work around. thats for all systems, as this happens to me with psx, neo geo, sega cd and pce. not sure if any others are effected, i’ll hopefully get to check this out over the next few days.

but any suggestions, or help would be wonderful,

thank you sevik

[labelwhore]

I can speak to this on a high level. I’m somewhat of a digital audio expert. However, I’m a linux noob.

The problem is, as the error states with the memory buffer for processing audio. Information isn’t being processed from that buffer fast enough to add anything else to it. Theoretically, there are two ways to fix it; increase the amount of memory allocated to the audio buffer, or reduce the amount of data flowing into it. The simple solution is the second option. We can easily do that by cutting the audio bit rate in half.

instead of this:

audio_out_rate=44100
audio_driver=sdl

do this:

audio_out_rate=22050
audio_driver=sdl

you could also try this:

audio_out_rate=24000
audio_driver=sdl

These are industry standard bit rates, try to stick to them or you may end up with strange audio artifacts or changes in pitch for music and sound effects.

[InsecureSpike]

this is awesome! thank you! I’ll try these when I get home from work!

thank you

[labelwhore]

With those settings, the audio may be a bit “crunchier” but heh, it’ll help add some vintage charm. :)

[Author]

Posts

[InsecureSpike]

is anyone else having this issue? is it serious? is there a fix?

i’m running;
h/w: raspberry pi 2 running from flash drive
s/w: latest version

edit:
think I’ll try this later

audio_out_rate=44100
audio_driver=sdl

[kitchuk]

I noticed this error as of recent. Anyone know what causes this?

[sevik]

I had this problem when running mupen64plus. In addition the sound was extremly loud. I fixed it by changing the audio plugin in “/opt/retropie/configs/n64/mupen64plus.cfg”.

# AudioPlugin = mupen64plus-audio-omx
AudioPlugin = “mupen64plus-audio-sdl”

Note: I’m not an expert and I don’t really understand what I’ve done. But so far it works ;-)

[InsecureSpike]

ok, so this IS a known issue!

http://mailman.alsa-project.org/pipermail/alsa-devel/2013-January/058136.html

i think i’s just a search now of a work around. thats for all systems, as this happens to me with psx, neo geo, sega cd and pce. not sure if any others are effected, i’ll hopefully get to check this out over the next few days.

but any suggestions, or help would be wonderful,

thank you sevik

[labelwhore]

I can speak to this on a high level. I’m somewhat of a digital audio expert. However, I’m a linux noob.

The problem is, as the error states with the memory buffer for processing audio. Information isn’t being processed from that buffer fast enough to add anything else to it. Theoretically, there are two ways to fix it; increase the amount of memory allocated to the audio buffer, or reduce the amount of data flowing into it. The simple solution is the second option. We can easily do that by cutting the audio bit rate in half.

instead of this:

audio_out_rate=44100
audio_driver=sdl

do this:

audio_out_rate=22050
audio_driver=sdl

you could also try this:

audio_out_rate=24000
audio_driver=sdl

These are industry standard bit rates, try to stick to them or you may end up with strange audio artifacts or changes in pitch for music and sound effects.

[InsecureSpike]

this is awesome! thank you! I’ll try these when I get home from work!

thank you

[labelwhore]

With those settings, the audio may be a bit “crunchier” but heh, it’ll help add some vintage charm. :)

[Author]

Posts