32 bit float

[joshbm]

Hello all,

I have a 32-bit float 6 channel 48000 wav. The only problem is I can't seem to get the conversion to AC3 correctly using ac3enc and BeSweet. How do you:

a) Convert the wav to ac3 keeping the 32-bit floating information.
b) Convert it back to a 6ch 32-bit float 48000 wav once it is to ac3?

PS- I did a search, but couldn't find what I was looking for.

Thanks!
- joshbm

[joshbm]

Common people someone has got to know this. Everytime I try to post something, I never get it answered :-\.

[Umma]

Josh,

DSPGuru does not recommend using Besweet and AC3enc to make AC3 files...at least that is how I understand what he said on page on of the Besweet FAQ.

For the other encoding techniques: Look on page two of the EoH stereo to ambisonics-surround guide. About half-way down the page there are several other how-to methods.

Hope I helped... :confused:

[bleo]

Hmmm a 9.2 Mbps wav file or 15min/GB? :D I hope you didn't top the wav file size limit which is either 2 or 4 GB. Also, most programs don't accept 32 bit float wav files at all. I'm not sure about BeSweet or ac3enc. I do know that oggenc does. You can also try 32 bit integer.

For your second question, azid and ac3filter can decode ac3 to 32 bit float wav files.

[joshbm]

Thanks all for the advice! I have a 3 minute song for a test so it is only about 250MB (6 ch). Now I know it is better to use a mux file then an actual 6ch file.

@Umma:

I have seen this post many times-- Do not use ac3enc :-\. Except it's free-- which is the main reason I am using it. All the suggestions on the 2nd page were regarding to SoftEncode not ac3enc. All I need to know how to do is to have the ac3 in 32bit float 48000 using ac3enc (or any other free software piece).

Thanks!
- joshbm