EXS 24 Logic Sampler Users Group

In a message dated 3/25/02 11:18:28 AM, exs@... writes:

>Is it just me ? But when I convert a Roland patch to the EXS24 format with
>and without the deemphasis and even though I see "de-emphasizing sample"
>on the progress window, every time both .wav files sound exactly the same.
>I don't trust my ears enough, so I used Wavelab to compare the original
>sample and the de-emphasized sample and there is not a single bit of
>difference between the 2 files. A pure placebo effect !

Bernard...your Roland deemphasis in Cd-Xtractr doesn't work 
correctly...that's why there's no audible difference in the files. The Roland 
emphasis curve is HUGE (about 20db at 18k) so it is VERY audible and easily 
measurable. This is why we have used Translator for this conversion in the 
past, Garth has a lot of different versions of the Roland de-emph curve that 
have been tweaked by ear as well as by scope. You can't do it properly by 
numbers alone. The info that Roland has for documentation of the curve is 
incomplete to do it this way.

This is an area that should be improved in Cd-Xtract in my opinion. (Try it 
with a Cymbal and you can hear the difference VERY easily). It's no 
placebo...that's for sure!

Eric Persing
Creative Director, Spectrasonics
Chief Sound Designer, Roland Corp