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Topic: Pre-Emphasis Encoder or EQ Chain (Read 3483 times) previous topic - next topic
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Pre-Emphasis Encoder or EQ Chain

There are many different ways to apply de-emphasis to compact discs, but I haven't found a way to encode a wav file with pre-emphasis. Is there an EQ chain or free program/VST that could encode using CD pre-emphasis?

Pre-Emphasis Encoder or EQ Chain

Reply #1 –
Try SoX:
Code: [Select]
sox input.wav output.wav treble 9.477 5283 0.4845

(these coeffs are for 44.1kHz files, of course)

It's just an inverse of SoX deemph filter.

Added: it's a biquad high shelf filter: gain = 9.477, frequency = 5283 kHz and 'slope' = 0.4845

Pre-Emphasis Encoder or EQ Chain

Reply #3 –
You can use this EQ VST with the values lvqcl posted. The behaviour should be right then.
http://rekkerd.org/matthew-lindsay-ncl-phase-eq/
Is troll-adiposity coming from feederism?
With 24bit music you can listen to silence much louder!

Pre-Emphasis Encoder or EQ Chain

Reply #4 –
If you apply pre-emphasis you should probably re-normalize (or at least check the peaks) because the HF boost could push your levels into clipping.   

You'll also need to make sure the pre-emphasis flag gets set on the CD.  (I have no idea how to do that.)

Quote
Is there an EQ chain or free program/VST that could encode using CD pre-emphasis?
Why would you want to do that? 

Pre-Emphasis Encoder or EQ Chain

Reply #5 –
Thanks everybody. You guys were way more helpful than the SH a**h*les.
 

Pre-Emphasis Encoder or EQ Chain

Reply #6 –
Quote from: DVDdoug on
If you apply pre-emphasis you should probably re-normalize (or at least check the peaks) because the HF boost could push your levels into clipping.   

You'll also need to make sure the pre-emphasis flag gets set on the CD.  (I have no idea how to do that.)

Quote
Is there an EQ chain or free program/VST that could encode using CD pre-emphasis?
Why would you want to do that? 


Just open the cue sheet using notepad and add it manually. And I'm trying to test the quality of my de-emphasis filter, and also test how pre-emphasis handles DR compression.