When the volume is near (or at) maximum, the sound sometimes cuts out or stutters. The video portion of a movie may also be affected.
Products affected
Solution
Upgrade to Mac OS 8.5.
Alternatively, lower the volume or change the Sound Monitoring Source so that it is not set to None or Built-In Mic. (The Sound Monitoring Source can be set with the Sound control panel or with the Sound portion of the Control Strip.)