On Fri, 05 Jan 2007 10:49:11 +0100 Sebastian Schäfer <[EMAIL PROTECTED]> wrote:
[deleted] > Ah, of course playback is fine when I do not use the mbeq plugin. > Behaviour stays the same when I use another LADSPA plugin. > How "heavy" is the other than mbeq plugin ? mbeq_119700, especially when it's configured the way you did it/need it, may be considered heavy, that's because, if ALSA buffer length is smaller than FFT length (that's a typical case), at the moment FFT buffers are filled FFT is launched for all 6 channels in you case. I mean, if, for example, ALSA buffer length is 1024, and FFT length is 8192, then 7 of 8 ALSA buffers the plugin is ding practically nothing, just copies data into input FFT fifos, and after the 8-th ALSA buffer FFT is lauched for every of the 6 channels. So, the CPU load is quite uneven. ... Well, the above is almost true - due to oversampling FFT is launched rather every 4 ALSA buffers, not every 8, which means twice the load, but more evenly distributed, but still, uneven. If you can, try to play with ALSA buffers at system level - for the case of 8192 length FFT I'd suggest 4096 samples long ALSA buffers, so FFT will be performed upon arrival of every ALSA buffer, and CPU load will be even. And I do not know how to change ALSA buffers length at system level - to tweak asound.conf ? Or to create .asoundrc in your home dir and set buffer lengths in it ? > Best regards, > Sebastian > --Sergei. P.S. Since a bug was found and fixed, I'm thinking about a followup release, and the example of mbeq_119700 has just proved yet another time that developers can not be trusted testers when it comes to testing their own stuff, so, will you help me testing the next release ? I think that the Perl part you've apparently used to configure the plugin will remain the same - the pieces intended for configuration, I mean. So it will hopefully won't take long to configure and test. -- Visit my http://appsfromscratch.berlios.de/ open source project. ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
