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Re: You probably missed it...(link)

*** I said it is impossible to reach 20kHz at the full dynamic range *you* claimed. (80..90dB) ***

And i supplied a counter example to your "impossibility"

you may not realise this, but not all cutting heads are equal. there are different types, and they have different limitations. also, 20kHz at full dynamic range is easy to obtain if you slow down to half speed mastering. widening the spacing between grooves will also help.

just because you have visited one pressing plant and attended one seminar means you know everything there is to know.

by the way, DVD-A has limitations that require filtering as well. 96/24 5.1 channels require MLP encoding to fit into maximum bitrate of 9.6 Mb/s. however, MLP assumes it is able to achieve a certain level of compression.

Some program material cannot be compressed easily and generate "illegal" files. For example, by definition white noise cannot be compressed, so 96/24 5.1 of white noise will generate an illegal MLP file. The solution is - guess what: filtering the high frequencies.

SACD avoids this issue by specifying a higher maximum transfer rate for the player: 16 Mb/s. so if the material cannot be compressed by DST, it is still legal and able to be transferred to SACD without filtering. you do reduce the maximum playing time though.


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