Originally Posted by http://forum.xda-developers.com/showpost.php?p=6312981&postcount=11
F0,PHONE_HEADSET_VOL0,0,4000,4000,0,4000,C8,0,2000 ,0,780,FF9A,2580..
F1,PHONE_HEADSET_VOL1,1,4000,4000,0,4000,1F4,0,200 0,0,780,FF9A...
F2,PHONE_HEADSET_VOL2,2,4000,4000,0,4000,5DC,0,200 0,0,780,FF9A...
F3,PHONE_HEADSET_VOL3,3,4000,4000,0,4000,1388,FFFF ,2000,0....
F4,PHONE_HEADSET_VOL4,4,4000,4000,0,4000,2EE0,FFFF ,2000,...
F5,PHONE_HEADSET_VOL5,5,4000,4000,0,4000,61A8,FFFF ,2000...
the most important value is the sixth (in hexadecimal) which is the volume value. if you use the volume level on the left side of the phone the volume of the the headset changes according the value reported in this file. I edit these values according to my "ears" ranging between c8(volume=200) and 61A8(volume=25000), and i clearly feel the change in the volume when i use the headset (you need an hex-decimal converter, there are several online)
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