I am using a bf527 based board with 2011R1-RC1 distro and 2011R1-RC2 tool chain. I did the following setting for the sound card.
Linux/blackfin 3.0.8 kernal configuration--> Device Drivers -->
<*> Sound card support --->
[*] Preclaim OSS device numbers
<*> Advanced Linux Sound Architecture --->
<*> OSS Mixer API
<*> OSS PCM (digital audio) API
[*] OSS PCM (digital audio) API - Include plugin system
[*] Support old ALSA API
[*] Verbose procfs contents
[*] Generic sound devices --->
<*> ALSA for SoC audio support --->
<*> SoC I2S Audio for the ADI BF5xx chip
<*> SoC SSM2602 Audio support for BF52x ezkit
(0) Set a SPORT for Sound chip
< > Open Sound System (DEPRECATED) --->
We built mixer and ALSA Utils. When we were trying to set the mic as recording device we go the following results.
root:/> mixer +rec mic
Invalid recording source mic
root:/> amixer sset 'Input Mux' 'Mic'
Simple mixer control 'Input Mux',0
Items: 'Line' 'Mic'
What might be the issue with the mixer application?