If you go to HKEY_CURRENT_USER/ControlPanel/SoundCategories/Ring/AttenuationCategory
Change the Value data it will increase your ring volume.
I would not recommend going any higher than 7 though after that the sound gets a
little distorted.
you also need an application to change your registry.....I use PHM RegEdit
file found here:
http://forum.xda-developers.com/showthread.php?t=273439
I'm not sure about your audio while talking though....I was gonna say Audio Booster but it seems your already using it.
if you find a solution to volume while talking please post it.
p.s. if you found that I've helped in any way feel free to hit the thank you button.
p.s.s. thanks in advance