Symptom
When listening to an audio file, the file contains only noise.
This happens when you have added a track directly from an audio CD into Logic Pro using the "Add Audio File" dialog. You then copied the track to the hard drive using the "Copy/Convert Audio File(s)" function in the local Audio File menu of the Audio window.
Solution
This issue only occurs when saving the audio file from within Logic Pro in AIFF format. It does not occur with the WAVE or SoundDesigner II file format.
To avoid this, you should first copy the CD track to your hard disk in the Finder, and then import it into Logic Pro from there. In this case, the AIFF file format can be used.
If you have already imported the track directly from CD into Logic Pro, then set the file format in Logic Pro's Copy/Convert dialog to "WAVE" or "SoundDesigner" when saving the track to the hard disk.
You can resolve the issue by upgrading to Logic Pro 7.1, in which you can now copy/convert audio files imported from CDs as AIFF.
A note about copyright
This software may be used to reproduce materials. It is licensed to you only for reproduction of non-copyrighted materials, materials in which you own the copyright, or materials you are authorized or legally permitted to reproduce. If you are uncertain about your right to copy any material, you should contact your legal advisor.