Originally Posted By: tanstaafl.
Is there software that will crudely and quickly equalize a batch of MP3 files, just stripping out everything above, oh, say, 3000 Hz?

What's the sample rate of the original WMAs? If it's 8KHz, make sure you're also creating MP3s at 8KHz. That in itself will wipe out anything above 4000 Hz.

Peter