You can control sound either from the Macintosh side or from the Apple IIe
Card software:
- From the Macintosh Control panel, you can slide the speaker volume
control from seven (loudest) to zero (silence), thus altering the
volume of the beep.
- From the Apple IIe Card Option panel, you can change the type of "beep" the
computer makes, but you cannot change the volume level.
Neither the Macintosh nor the Apple IIe Card can control the sound(s) that
an application makes. For example, computer and card panel settings will not
affect a music program or a game's sound effects.