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At 04:10 PM 3/26/2003 +0000, Copeland, Peter wrote: >Dear All, > I have two comments about the discussion on "CD Writing Programs", one >technical, and one non-technical. Again, I ask that we keep separate issues which are distinct from one another. I doubt that anyone with experience questions the influence of software which can alter the sound as recorded to the hard drive. Any analogue processing, ADC or audio editing must use appropriate hard- and software to deliver quality product. Indeed, on another thread, I recommended that if you must alter pitch, you do it via sample rate to avoid the interpolation and other errors of software resampling; I understand that hardware resampling is often worse still. But this thread dealt with the software which converts (redbook) files on the hard drive to the recording on the CD. That is another matter altogether and while the audio mastering programs vary widely in their features, all I have used, seen or heard of leave the content of the audio stream intact. They reorder the bits and feed them to the drive. As I said in my post on DC offset, I know of some problems which it introduces and how simple it is to correct. Rather than investigate other effects, I simply correct the offset when it occurs and move on. Unfortunately, the other source(s) of even-harmonic distortion are not easily corrected and often prove intractable. The only saving grace is that they are amplitude-dependent and are therefore seldom as disturbing to software or to the ear as distortion which is not. Mike [log in to unmask] http://www.mrichter.com/