Seeing that the president of MQA came from Warner, I'm sure he's well aware of what goes on in the studio. It might just be a matter of your average modern consumer's distribution / consumption habits and various demographics
On Mon, Jan 10, 2022, 6:47 PM vicki melchior <[email protected]> wrote: > Your confusion is different than Eric’s though. I was aiming to address > his previous post about "well i'm not here to talk about whether or not i > can discriminate dither from music” > > > I agree with your comments. Subtractive dither is used in the MQA codec > because Peter Craven is trying to salvage every last ounce of SNR, but it's > not difficult to handle in a streamed file, and in a situation where the > original file’s specs are measured during encoding. > > Vicki > > > On Jan 10, 2022, at 5:53 PM, robert bristow-johnson < > [email protected]> wrote: > > On 01/10/2022 1:37 PM vicki melchior <[email protected]> wrote: > > > Okay. In the context of subtractive dither, I understand the confusion. > > > I don't. I'm just confused. > > Yes, the purpose of subtractive dither is to reduce the total dither noise > remaining in the output, typically after adding dither during bit > reduction. Clearly, that will increase the SNR > > > But only by 4.77 dB. But, hey, it's 4.77 dB. So if they can standardize > how the dither is generated from the LSBs of the quantized signal, and, if > noise shaping is done, what the transfer function is from dither to > quantized output, then why not do this subtractive dither thing? > > The worst that can happen is that the receiver does not decode those LSBs > and subtract the dither. Then you're no worse off than if it was just > additive dither and you don't recover those 4.77 dB SNR. > > and allow you to hear more of the signal. > > > only really makes a difference if the audio is living down by the noise > floor (which it could be if it's a CD and classical or uncompressed > acoustic music with a large dynamic range). > > but 4.77 dB is 4.77 dB. that's something. 96 dB dynamic range is better > than 91 dB. > > -- > > r b-j . _ . _ . _ . _ [email protected] > > "Imagination is more important than knowledge." > > . > . > . > > >
