If it is true that a noticeable glitch is produced, then obviously you have a point, however if the glitch is not noticeable then I don't see the problem you have with PA.
In the pro audio world the spinning of a cd has been noted to introduce errors as well as the windows volume control which is often bypassed by pro audio cards. This isn't necessarily something you can hear especially on a casual system. Of course bullshit is also rife and quite amusing sometimes. The same pro audio world sells £10,000 gold power cables as thick as your arm and then plugs them into a standard copper wall socket. -- _______________________________________________________________________ 'Write programs that do one thing and do it well. Write programs to work together. Write programs to handle text streams, because that is a universal interface' (Doug McIlroy) _______________________________________________________________________