[mythtv-users] Error: Try to manually increase audio buffer with: echo 192 | sudo tee /proc/asound/card0/pcm1p/sub0/prealloc

Steven Adeff adeffs.mythtv at gmail.com
Wed Apr 20 16:32:20 UTC 2011

On Mon, Apr 18, 2011 at 11:32 PM, Jean-Yves Avenard <jyavenard at gmail.com> wrote:
> On 19 April 2011 13:00, Chris Porter <hoodlum7 at gmail.com> wrote:
>> The user mythfrontend is running as does not have permissions to increase
>> the audio buffer. I suggest putting the line
>> echo 192 | sudo tee /proc/asound/card0/pcm1p/sub0/prealloc
>> into one of your startup scripts.
> Note, that using more than 64kB of audio buffer is only working with a
> limited amount of card, mainly Intel and nVidia.
> It you see this error, and audio plays fine, no need to worry.
> It's not much of a problem playing stereo audio, or digital AC3/DTS
> However, using LPCM audio or TrueHD/DTS-HD bitstreaming will be an
> issue with just the default 64kB

this is for an nVidia GT220. what permission changes would I need to
make to safely allow the user to adjust it?

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