Can someone give a explan what the System Performance indicators mean?

Can someone give a explan what the System Performance indicators mean?
Audio & Disk I/O
Thank you,
Scott
G5 Dual 2.0 - 2.5 Gigs Ram   Mac OS X (10.3.9)  

Hi Scott!
Audio is your CPU activity, and Disk i/o is the amount of bandwidth you're using when streaming files from the hard drive (audio files and sample streaming).

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