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Topic: Correct values for dither in Adobe Audition (Read 9311 times) previous topic - next topic
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Correct values for dither in Adobe Audition

L.S.,

For mastering purposes I want to apply dither to a 32 bits audio sample (to make it suitable for cd) and I want to do this with Adobe Audiotion 1.5.

When I go to the Mix Down Dithering Options, I have to fill in 3 items. The PDF, its noise shaping and the amount of Dither Depth in bits. Is this a peak value, or a peak-to-peak or even an RMS value. I want to use 2 LSB peak-to-peak triangular dither with no noise shaping. Can anyone help me out?

Regards,
Jacco
Logical reasoning brings you from a to b, imagination brings you everywhere.

Correct values for dither in Adobe Audition

Reply #1 –
Quote
L.S.,

For mastering purposes I want to apply dither to a 32 bits audio sample (to make it suitable for cd) and I want to do this with Adobe Audiotion 1.5.

When I go to the Mix Down Dithering Options, I have to fill in 3 items. The PDF, its noise shaping and the amount of Dither Depth in bits. Is this a peak value, or a peak-to-peak or even an RMS value. I want to use 2 LSB peak-to-peak triangular dither with no noise shaping. Can anyone help me out?
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Yes, the correct settings to deliver this are Enable Dithering, Dither Depth (bits) 1, p.d.f. triangular, No noise shaping.

It's RMS in this case, but I haven't checked the other dither options to see if it's always RMS.

Cheers,
David.

Correct values for dither in Adobe Audition

Reply #2 –
Thank you. I assume that the math behind it is quite straightforward: to go from 1 bit RMS and peak-to-peak 2 LSB. For now I can go on.

Regards,
Jacco
Logical reasoning brings you from a to b, imagination brings you everywhere.

Correct values for dither in Adobe Audition

Reply #3 –
I'm using 0.5 bits, shaped triangular, no noise shaping. It's not that I understand the secrets of dither. I just found this to be the best compromise between noise increase and distortion reduction by listening test (turning up the volume, of course), and I prefer to have less noise and more distortion.  More than 0.5 bits changes silence into dither noise, and I want null samples to stay null samples.
I know that I know nothing. But how can I then know that ?

Correct values for dither in Adobe Audition

Reply #4 –
Quote
compromise between noise increase and distortion reduction
Yes, I am aware of such trade-offs. For now, I want to stick to the theoretical background. If there is more noise involved, so be it.

Regards,
Jacco
Logical reasoning brings you from a to b, imagination brings you everywhere.