https://www.alsa-project.org/main/api.php?action=feedcontributions&feedformat=atom&user=Android+edsam 2026-04-20T12:28:06Z User contributions MediaWiki 1.39.0 https://www.alsa-project.org/main/index.php?title=User_talk:Android_edsam&diff=6014 2011-07-19T05:17:53Z

<p>Android edsam: Arecord will lost audio data when both playback and record on but in different sample rate.</p> <hr /> <div>platform: wm8993+at6700(702Mhz), use alsa, The record audio data will lost when both playback and record on but in different sample rate.But wm8993 has just one digtal interface.So wm8993 playback &amp; capture work under one sample rate.<br /> <br /> Use alsa utils aplay for playbback, and arecord for record.<br /> Repeat step:<br /> 1、use aplay to play a wave file(44.1k, 2channel,16bit format) in background，this file duration about 11 minutes;<br /> 2、run cmd &quot;date&quot; get system time info;<br /> 3、start arecord,but sample rate is 8k,2 channel,16bit fromat, want to record 10minutes;<br /> 4、run cmd &quot;date&quot; get system time info again;<br /> 5、calculate step4 time - step2 time,about 10minutes and 3seconds.<br /> Those steps run in one script.<br /> So,arecord can't get 10minutes theory data in normal 10minutes, audio data lost. During record,there is no alsa err happen.<br /> I don't know where maybe exist problem.Look forward for your help.</div>

Android edsam