EDIT: I ended up using BeHappy with Aften to do the encoding and it works great. Just set DRC and Normalize. Then it works great. I want to try applying dynamic range compression to an AC3 using BeSweet(1.4 and 1.5b31) with BeLight(0.21) but keep getting errors. Here is the log: http://pastebin.com/PiEvnxpq So I tried eac3to and more gui but can't figure out how to apply dynamic range compression to it. Is it not in the GUI? The bottom line is I want to apply dynamic range compression to ac3. My media player(WD Live) already down mixes multi-channel audio 2 channel audio but in the interest of testing, I also wanted to down-mix the channels. Can any one recommend app with a GUI to do all this?