how to improve audio quality?

I just installed Jami and i'm trying to use it; I'm impressed about the long avalaible codecs list. I'm a musician, pianist and piano teacher, I was hoping that this Jami would have solved my problems : how to get a video connection with a good audio quality, these are what I'm requiring:

• manual volume control
• no high or low pass filters
• audio in stereo mode

it could let me make online lessons. I heard that bass notes of the piano are sent at good quality, but there is I think an automatic gain control that is shading every note I do. Is there a way to remove this automatic AGC?

dario