I have to state right off that I am hard of hearing so please take the following with that in mind.
We all know that the N7 leaves much to be desired for speaker output. Maybe just me but 4.2.1 made it worse.
So after trying a couple "sound boosters" with no luck I finally found DPS Manager.
It seems to have helped ever so slightly.
May want to give it a try if your having same issue.
http://www.mediafire.com/?xe6r471z4vnka29
From my device to yours
We all know that the N7 leaves much to be desired for speaker output. Maybe just me but 4.2.1 made it worse.
So after trying a couple "sound boosters" with no luck I finally found DPS Manager.
It seems to have helped ever so slightly.
May want to give it a try if your having same issue.
http://www.mediafire.com/?xe6r471z4vnka29
From my device to yours