3Click the icon that represents the source of sound output.
About the sample rate: Most of the time you will not need to change the sample rate. Use the Rate
m Do not set the sample rate higher than the sample rate of the sound you are playing, since this slows your computer’s performance without improving sound quality.
m Do not change the sample rate if playthrough is in effect.
m Do not change the sample rate for sound coming from a device connected to the sound input port.
The other options cannot be changed. If you use a program that provides sound recording in mono format, you can use its mono setting.
4Close the Sound control panel.
Recording an alert sound
Although your Macintosh can produce stereo sound, the computer records alert sounds in the same way as other Macintosh models: in