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20-bit audio?

 
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supergimp



Joined: 12 Nov 2006
Posts: 8

PostPosted: Sat Jun 20, 2009 6:51 pm    Post subject: 20-bit audio? Reply with quote

I don't think Amadeus will do this, but correct me if I'm wrong or
please make other suggestions. Does anyone know how I can create 20-
bit wav files from 24-bit on Mac OS? I can do this on a PC in Wavelab,
but am struggling with a Mac solution.

We make audio for Blu-Ray titles for film studios and often have to
hit very difficult data size targets. Occasionally we will truncate to
20-bit before lossless encoding with Dolby TrueHD or DTS HD MA in
order to reduce the file size slightly. This is a better compromise
than dropping all the way down to 16-bit, but unfortunately I have to
move to another platform right now (Wavelab running on Win) to do this
and then come back to Mac OS to encode.

I've tried using almost anything I can find (including SoX - Sound
eXchange - whick looks like it should do it but doesn't) but can't
seem to find a solution.

Thanks in advance.

Steve


Steve Thompson
sthompson@mac.com



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Martin Hairer
Site Admin


Joined: 08 Nov 2006
Posts: 1615

PostPosted: Sun Jun 21, 2009 8:16 am    Post subject: 20-bit audio? Reply with quote

Quote:
We make audio for Blu-Ray titles for film studios and often have to
hit very difficult data size targets. Occasionally we will truncate
to 20-bit before lossless encoding with Dolby TrueHD or DTS HD MA in
order to reduce the file size slightly.

Most lossless encoders (FLAC and Apple Lossless in particular, I don't
know about the others) allow you to set the number of bits that should
be taken into account. This way it makes no difference whether you
feed them a 24Bit or a 20Bit file. Regards,

Martin

HairerSoft
http://www.hairersoft.com/


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