User talk:Android edsam

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 & capture work under one sample rate.

Use alsa utils aplay for playbback, and arecord for record. Repeat step: 1、use aplay to play a wave file(44.1k, 2channel,16bit format) in background，this file duration about 11 minutes; 2、run cmd "date" get system time info; 3、start arecord,but sample rate is 8k,2 channel,16bit fromat, want to record 10minutes; 4、run cmd "date" get system time info again; 5、calculate step4 time - step2 time,about 10minutes and 3seconds. Those steps run in one script. So,arecord can't get 10minutes theory data in normal 10minutes, audio data lost. During record,there is no alsa err happen. I don't know where maybe exist problem.Look forward for your help.