cut join ac3

[bennyvo]

anyone know the software that can cut and join ac3 audio?

thanks

[mats.hogberg]

Joining is done at file level (as AC3 is headerless):

copy part1.ac3+part2.ac2 b:bothparts.ac3

/Mats

[bennyvo]

i don't understand...

[mats.hogberg]

Sorry - I thought you knew something about computers... :P (Just kidding!) To join two files, you just open a DOS window (command line) and type "copy file1.ac3+file2.ac3 b:bothfiles.ac3" and hit enter (the big key to the right of keys with letters on them) (just kidding again!) and voila! You now have bothfiles.ac3, which is file1.ac3 and file2.ac3 joined together. Couldn't be simpler!

/Mats

[bennyvo]

oh thanks, i thought it would be in dos but you didn't mention it.

any cut tool?
would the quality of the ac3 be reduce if convert to wav? if can't cut straight from ac3 format then i must convert it to wav to cut it then convert it back to ac3.

[mats.hogberg]

would the quality of the ac3 be reduce if convert to wav?

No, but...

convert it back to ac3.

but this will reduce the quality. Probably not noticeable, but even so... Every decode/reencode sequence introduces a new quality loss (if you're not using a lossless codec which mp? and ac3 isn't).

/Mats

[anubis13]

I have converted ac3 to wav and back numerous times and I have never heard a difference.

i use studio quality monitor speakers on my audio rig and to my ears, the theoretical degradation of ac3/wav/ac3 recompression is not easily noticed, if at all, with the human ear.

[bennyvo]

cool... what software you use to convert to ac3 to wav and wav to ac3?

[anubis13]

ac3 to wav=PX3Convert
wav to ac3=sound forge 7.0 or vegas 5.0

[mats.hogberg]

There's a free alternative to wav to ac3 - ffmpeg with ffmpeggui. Very simple, and does the job without fuzz.

/Mats

[bennyvo]

thanks, i'll try them

[BJ_M]

I have converted ac3 to wav and back numerous times and I have never heard a difference.

i use studio quality monitor speakers on my audio rig and to my ears, the theoretical degradation of ac3/wav/ac3 recompression is not easily noticed, if at all, with the human ear.

you may want to get a hearing test asap -- there is a huge very noticeable difference ..

[gastorgrab]

How about installing AC3ACM, and adding a WAV header.

Can't AC3 be cut in VDubMod using the source range with "Direct Stream Copy"?

[anubis13]

you may want to get a hearing test asap -- there is a huge very noticeable difference .

are you sure?
what equipment are you using to listen to your ac3 and wavs

if you mean downmixing a 5.1 to a stereo wav, then yes there is a huge difference.

i regularly convert a stereo ac3 to a 48 kHz wav, edit in sound forge 7.0 and recompress to ac3 with no audible difference.
i have done A/B comparisons on all the converting stages.

I use a Layla 24 audio card and Behringer Truth B2031 monitor speakers

if i'm not hearing something that i should be it concerns me greatly. i've spent alot of cash to try to get a good neutral sound

[BJ_M]

i work in a real studio with real studio equipment .. but i can tell the difference even on my home systems.

[anubis13]

What is the difference you hear?
does it compress the dynamic range?
does it introduce noise?
what exactly does it to to the sound?

[jorsi]

In a dos command prompt in order to merge two ac3 files you need to use "copy /B file1.ac3+file2.ac3 both.ac3" ac3 files are not plain ASCII, so you need to add /B, so it is COPY /B <source file1>+<source file2> <destination file>

[noemi7]

...and you figured it after 9 years...

[jorsi]

Hello noemi7, no I don't figured it after 9 years lol, I was searching around and noticed this wrong posting here, just wanted to be helpful to someone who might be searching for something like this, I'm a computer tech with knowledge in dos from the old school.