Apply the diff file from http://forum.xda-developers.com/showpost.php?p=17031938&postcount=97 Disable debug output and fix typo by tytung. Usage: echo 'device_id level' > /proc/mic_level Level range: 0-1000; -1 use level from acdb Current levels (device_id): HANDSET (0): -1 SPKR_PHONE (1): -1 HEADSET (2): -1 TTY_HEADSET (3): -1 BT_SCO (4): -1