edited - help me feed mono WAVs into aften!

[Blue_MiSfit]

Hey folks,

read next post by me

So I'm doing a dirty little audio encoder roundup. I'm comparing Aften AC3, Aften EC3, and Dolby's Professional EC3 encoder (I have access to this at work. Yowza!)

I have a nice TrueHD source from Batman Begins, and decoded to WAV its ~4.3 GB.

I'm trying to (easily) cut a section roughly 5 minutes out of the middle. I will then take this clip, encode it with various settings, and compare the results.

The problem is, none of the applications that I use seem to enjoy the 4GB+ file generated by eac3to. I guess it's making RF64 WAVs, since AFAIK thats the only way to break the 32 bit barrier on WAV.

I can load the WAV into any program, but it only get the first 17 minutes or so - the rest vanishes into the ether! :) Sound Forge seems to do the same thing.

So... does anyone have a suggestion as to how I could trim this source? Maybe I can trim the THD track ahead of time? Mono WAVS? I'm really not sure how to proceed... working on mono WAVs atm...

Thanks people!
~MiSfit


Noticed the other day that I finally passed 2k posts. Ding!

[tebasuna51]

I'm trying to (easily) cut a section roughly 5 minutes out of the middle. I will then take this clip, encode it with various settings, and compare the results.

You can use BeHappy, open the wav >4GB with RaWavSource() and select Split (in Tweak) and the limits in ms.

[Blue_MiSfit]

I ended up splitting to mono WAVs (for the Dolby encoder, which only accepts this input), and trimming a small section in Audacity. So, I have mono WAVs, and encoded them with the Dolby encoder.

Now, how the frack do I feed mono WAVs into Aften?

~MiSfit

[tebasuna51]

You can use WAV to AC3 encoder (http://thefrontend.sourceforge.net/EncWAVtoAC3/) or the command line parameters:
[-ch_X file] Add a mono file to the input list as the channel specified
ch_fl = Front Left
ch_fc = Front Center
ch_fr = Front Right
ch_sl = Surround Left
ch_s = Surround
ch_sr = Surround Right
ch_lfe = LFE

Edit: I'm interested in your test (I haven't a Dolby encoder).
Especially when use DRC.

[Blue_MiSfit]

Well... at 256kbit, AC3 falls flat on its face. DDP through Aften isn't any better. The low-pass filtering is insane.

I'll see how the Dolby encoder performs (it damned well better do something more impressive than this for its obscene price)

~MiSfit