Re: [SurroundSound] Re: Why (Almost) Everything You Thought You Knew About Bit Depth Is Probably Wrong

Yes, that's correct Audition only mentions the depth.. My memory suffers from age too every now and then ;-)

I used to do everything in 32 bits float, but playing it back in 5.1 was impossible..... (in the past ! Don't know if that changed.)

 

However there are upmix methods where upsampling first and downsampling after the process , did make a hearable difference !

As an example : In the past I used Audition and pulses from different recording studios with convolve to produce Ambisonics.

Those pulses where avaliable in 24/44.1 and in 24/96, which were recommended to use.

There was a clear difference in the quality of the sound with upsampling to 24/96, use the 24/96 pulses and downsample the outcome back to 24/44.1 .

(Although not about the 16 vs 24 bits or 44.1 vs 96 Khz, this article describes almost the same method and is just FYI : http://convolver.sourceforge.net/binaural.html )

 

I don't use those methods anymore, because the latest methods are so much improved that 24/44.1 Khz is enough.

 

"This extra wiggle room lets you do insane amounts of processing" > LOL, that's exactly what I do ;-)

 

 

 

Op woensdag 2 oktober 2013 04:42:22 UTC+2 schreef zoop:

THe last time I looked, Audition recommended doing processing at higher bit depth.  That's to avoid theoretically  audible accumulation of 'math' errors during processing.  That's reasonable.  Upping the sample rate doesn't matter for that though, and I don't recall it being recommended.

Colletti alludes to this too in his article, as one of the two valid reasons why higher bit depths CAN be good   (the other reason being more headroom during live recording)

"But for some tasks, even 24-bits isn't enough. If you're talking about audio processing, you might go higher still.

32 Bits and Beyond

Almost all native DAWs use what's called "32-bit Floating Point" for audio processing. Some of them might even use 64 bits in certain places. But this has absolutely no effect on either the raw sound "quality" of the audio, or the dynamic range that you're able to play back in the end. What these super-high bit depths do, is allow for additional processing without the risk of clipping plugins and busses, and without adding super-low levels of noise that no one will ever hear.  This extra wiggle room lets you do insane amounts of processing and some truly ridiculous things with your levels and gain-staging without really thinking twice about it. (If that happens to be your kind of thing.) "

 

It's why your AVR is very probably converting all 16bit audio to 24 or 32 bit, unless you ahve it set to 'Pure Direct' output.

 

On 10/01/13 13:17, EoH wrote:

I DO need more bitdepth and rate.

Some of the upmixroutines, just work better (more precise) with 24 bits and 88.2 or more Khz than with 16 bits and 44.1 .....

It's BTW clearly mentioned in the Audition manual : if you're gonna put your files through a proces, it's better to upsample first

from 16/44.1 to e.g. 24/96 , use that on the processes and downsample afterwards back to your original.

 

But I also think that changing a stereo 16 bits to 24 bits doesn't make any difference at all.

 

 

 

 

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