KVR Audio

jmbriley · Post by **jmbriley** » Wed Apr 27, 2005 11:33 pm

OK in a 24 bit Acid project, I know you can have a variety of waves, i.e. 16 bit waves, 24 bit waves and 32 bit waves all in the same project. My question is since Acid only exports as high as 24 bit, do you have to dither anything if the project contains 32 bit or 16 bit waves. Thanks.

billybk1 · Post by **billybk1** » Thu Apr 28, 2005 1:19 am

jmbriley wrote:OK in a 24 bit Acid project, I know you can have a variety of waves, i.e. 16 bit waves, 24 bit waves and 32 bit waves all in the same project. My question is since Acid only exports as high as 24 bit, do you have to dither anything if the project contains 32 bit or 16 bit waves. Thanks.

No, you don't have to dither when exporting, in ACID Pro. Even if you have a 24bit/96k project, in ACID and you export it to a 16/44 stereo wave file. The whole signal chain is run at whatever sample rate/bit depth you render at. If you export that 24/96 project, as 24/96, and import it into a stereo editor like Sound Forge, to "master" then you would have to dither when creating a 16/44 redbook standard wave file. This question was posed on the ACID forum not too long ago. Peter Haller (ACID developer), responded with the following post. Which I thought was quite interesting, and I was unaware of myself, so I saved it to my ACID tips and tricks file:

In the end, when you render to a CD or a file in ACID, the whole signal chain is run at 44.1 or what ever the sample rate/bit depth you choose to render the file at. That is, the sample rate you are working/editing in has nothing to do with the final rendering. Rendering at 44.1 is the same as if you set your project sample rate to 44.1.

If you render to 48/24 then "master" that file in Sound Forge or CD Architect, then you need to be concerned about sample rate changes and dither.

Peter

jmbriley · Post by **jmbriley** » Thu Apr 28, 2005 1:24 am

So is it OK to render a project to a 24 bit file if that project also contained 32 bit waves.

SonyPCH · Post by **SonyPCH** » Thu Apr 28, 2005 1:58 am

Yes. ACID works with normalized floating point internally. So any file loaded on to the track is converted from fixed point to floating point.

Q: Were did these 32 bit files come from? Are they fixed point or floating point files?

Peter

jmbriley · Post by **jmbriley** » Thu Apr 28, 2005 2:23 am

They are loops I made from FL Studio so I guess they are 32 bit float, thanks for your help man.

? about Acid Pro 4 and different bits of wave files.