On Mon, 2006-01-09 at 17:37 +0100, "Alexander Carôt" wrote: > Hi to all, > > again one question regarding latency : > > If my soundcard is configured with 48 kHz, 256 Samples/frame it blocks for > 2,6 ms. > > Are these 2,6 ms valid for input AND output - thus does it take 2,6 ms for > capturing + 2,6ms for playing back the signal (= 5,2 ms total delay) ? > > Thanks in advance
Yes, that's how it works. There could be up to one period between the capture and playback interrupts, so your input to output latency is anywhere from 5.2ms to 7.8ms. Plus the soundcard ADCs may add up to 1ms of latency, so if you measured it with a scope it could be as high as 10ms. If you can get it to work at 128 frames you'll be in good shape, but that pushes the limits of what the standard kernel can keep up with. Lee ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
