Most 'true' way to de-emphasize CD image, Remove pre-emphasis - possible and best ways? Options

[EvilMax]

Hello!

Have a question related to de-emphasizing of images of audio CDs mastered with pre-emphasis. What I've already found on this topic:

1. Using Waves Q10 plugin. But it seems to me that equalizer plugin is not the best way to achieve originally mastered sound.
2. Using foobar2000 convolver with Waves_De-Emphasis pulses. Don't know anythig good/bad for this way.

So does anybody knows what way is 'true' to de-emphasize wave file?

PS: I know that using EAC or K3b to burn CD and delegate de-emphasizing to CD player will solve issue. But for some reasons I need to have images on my PC and ability to play them or several tracks on players that don't support 'pre' flag.

[pdq]

ANY operation on the data other than scaling by exactly a power of two will fill all 24 bits.

[Porcus]

ANY operation on the data other than scaling by exactly a power of two will fill all 24 bits.

But a parametric EQ shouldn't make it that much harder to compress? Or?

[DVDdoug]

ANY operation on the data other than scaling by exactly a power of two will fill all 24 bits.

But a parametric EQ shouldn't make it that much harder to compress? Or?

If you keep it at 16-bits, then it's no harder to compress. If you upsample to 24 bits without processing, it's no harder to compress. If you go to 24 bits and do any processing, then yes... As pdq said the extra bits are "filled up".

You are working with integer files, and when you go from 16 to 24 bits, the additional bits are analogous to digits to the right of the decimal point. The extra bits are not used to make your file "louder", they are used to give you more "detail". (That's not strictly true... 24 bit audio is also used to get more headroom.)

Your data is integer form, but your scale factors are not... So, when you apply a mathematical operation to your 16-bit integer, you need more precision, or you can round-off.

For example, if you increase a sample value by 1dB, that's a scale factor of ~1.12202. With integer data that's going to require rounding. You will get more precision (less rounding error) with 24 bits. And, the higher precision means it's "harder" to compress.

This post has been edited by DVDdoug: Feb 24 2010, 20:52