I applied the patch, but I lost the mic recording in videos and in mydicto application. I restored with the script and the recording came back thankfully.
Afterwards I changed the last amixer commands in the script to
amixer set Capture cap
amixer set Capture 100%
and run it again.
This time I did not loose mic recording and I 'll leave it as it is for the moment checking what has actually changed in performance and battery usage.
I am using power kernel but I do not believe it has anything to do with the mic, working or not.
I also need to understand better amixer parameters.
Keep up the good work.