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SoundMaster is a nice and free control panel addition for System 6 or 7 that lets you set a custom sound to play for each specific Mac OS event, such as when you press a key, empty the trash, shut down your computer, etc...
Starting from Mac OS 8, the Appearance Manager would let you select a SoundSet file, but SoundMaster offered an even greater level of customization by allowing you to select invidiual sound files for each event, essentially allowing you to kind of build your own SoundSet if you will and this, on much earlier versions of Mac OS.
soundmaster185.sit (48.82 KiB / 49.99 KB)
SoundMaster v1.8.5 / compressed w/ Stuffit
SoundMaster_Disk.img_.sit (2.18 MiB / 2.28 MB)
SoundMaster v1.8.4 (plus Vol. 2, Star Trek Sounds) / DiskCopy image, compressed w/ Stuffit
soundmaster1.8.4.sit (55.94 KiB / 57.28 KB)
SoundMaster v1.8.4 (older) / compressed w/ Stuffit
SoundMaster1-7.3.sit (42.1 KiB / 43.11 KB)
SoundMaster v1.7.3 (1992), System 7 / compressed w/ Stuffit
SoundMaster--1-7.2-.sit (29.94 KiB / 30.65 KB)
SoundMaster v1.7.2 (1991) / compressed w/ Stuffit
SoundMaster1-6.5.sit (31.08 KiB / 31.83 KB)
SoundMaster v1.6.5 (1990), System 6 / compressed w/ Stuffit
SoundMaster1.2.sit (13.14 KiB / 13.46 KB)
SoundMaster v1.2 (1988) / compressed w/ Stuffit
At least 1MB of RAM (recommended 2MB, depending on how big your sound files are)
Mac OS 6.x - Mac OS 7.6
This is a control panel. To install it, drag and drop it on your System Folder and reboot your computer.
Emulating this? It should run fine under: SheepShaver