Deemphasis computer software?

[Agent327]

I have a few CD's that use pre-/deemphasis that I can't play through my DF1700/PCM63 DAC.
Off course they sound awful.

Does anybody know a computer program that can resample / deemphasize wav files or perhaps do that while extracting audio from the CD, so I can burn a new (proper) one.

This must be a common problem but I have found nothing here or with google.

Any advice would be much appreciated.

Kees.

p.s. Who can make a smiley with fingers in the ears?

[error401]

Originally posted by Agent327
I have a few CD's that use pre-/deemphasis that I can't play through my DF1700/PCM63 DAC.
Off course they sound awful.

Does anybody know a computer program that can resample / deemphasize wav files or perhaps do that while extracting audio from the CD, so I can burn a new (proper) one.

This must be a common problem but I have found nothing here or with google.

Any advice would be much appreciated.

Kees.

p.s. Who can make a smiley with fingers in the ears?

Sox can perform de-emphasis of most a wave file. There is a Windows binary available, so it would not be difficult to write a simple batch file and use EAC's custom external compressor option to first filter with Sox and then compress with your encoder of choice.

[Agent327]

Thanks, Error401, I will try Sox.

But why would I need to compress the resultant WAV file before burning the CD?

Cheers,
Kees

[richardash1981]

You wouldn't - 16-bit 44100Hz stereo WAV files are fine for CD creation (the data on CD is actually big-endian (like AIFF), but most CD burning apps on little-endian platforms prefer little-endian files and convert on the fly).

Given this is a digital filter of some sort, there will be good and bad ways of implementing it, as well as fast-but-inaccurate vs slow-but-accurate ways. I've no idea how good or otherwise the implementation in Sox is - the re-sampling algorithms are known to be problematic.

Might be interesting to try some other tools and see if there is a perceptible difference, although to do this would mean knowing what the specified equalisations are.