Command-line AC3 decoder / normalizer that supports pipes?

[madoka]

Basically I'm looking for an AC3 decoder and a WAV normalizer (or one that does both) which supports pipes, so that I can feed the output directly into LAME without an intermediate file. Something like:

ac3dec audio.ac3 -out - | normalize - -out - | lame --alt-preset standard - audio.mp3

or

ac3decnorm audio.ac3 -out - | lame --alt-preset standard - audio.mp3

[setarip]

If I remember my DOS correctly, shouldn't any true DOS program be able to avail itslef to pipes (an intrinsic command)?