[alsa-devel] Reg: Audio recording with twl4030 codec
shariffsinbox at gmail.com
Fri Jan 22 10:57:23 CET 2010
I am working with OMAP3 based custom board that has twl4030 codec &
using linux-2.6.29 kernel from opensource.
I have some queries regarding Audio recording.
Audio codec is connected to twl4030 as bellow
| |------ MAINMIC
McBSP2 ------ |i2s/tdm |
--> One Analog MIC is connected to Main Mic and I am using Audio path
not the Voice path.
After selecting Main Mic through amixer control.
and recording audio using "arecord -c 1 -r 8000 -f S16_LE -t wav
-d 20 record-file.wav"
--> Here record is successful but with lot of noise.
1) Can we record Mono(1 channel) through I2S from TWL4030 codec?
2) To record stereo(2 channels), do we need two Mic's ? (i.e do I
need Sub Mic also).
More information about the Alsa-devel