How do you know the volume level of each channels in a 5.1 track?

[zee944]

I'm searching for a tool which can tell the volume levels of each channels in an existing (already encoded) AC3 5.1 mix.
Something which tells something like:

C: -4.76 dB (maximum)
FL: -3.87 dB (maximum)
FR: -3.82 dB (maximum)
SL: -6.78 dB (maximum)
SR: -6.79 dB (maximum)
LFE: -0.05 dB (maximum)

OR

C: -12.56 dB (average)
FL: -14.33 dB (average)
FR: -14.82 dB (average)
SL: -19.72 dB (average)
SR: -19.68 dB (average)
LFE: -22.87 dB (average)

The reason I'm asking this because I'm having problems with achieving the same mixing levels after reencoding an AC3 file.

Please help

[raquete]

why you are reencoding AC3 files?
if you're trying to change levels between channels or encrease the general level it can be done but when reencoding you're losing quality then...no big deal.

[zee944]

why you are reencoding AC3 files?
if you're trying to change levels between channels or encrease the general level it can be done but when reencoding you're losing quality then...no big deal.

I have to do a little bit of editing in them (long story, not interesting). So I have to reencode them no mather what.