(There's no video for Mac Keyboard yet. Please contribute to MR and add a video now!)
MacKeyboard lets you use your keyboard as a crude piano. It's monophonic tough, so only 1 note can be played at a time; pressing another note before the sound ends will cut the playing note and begin playing the new note. You can, however, specify to only play an arbitrary number of bytes in from the given sound file. The author also mentions in the ReadMe file: "There is no bounds checking on the values you enter, since I liked being able to "listen to memory" by typing out-of-bounds numbers, but be warned: This could crash your system."
MacKeyboard can play sounf files from both Amiga's and 1980's Macintosh sound file formats.
MacKeyboard.sit (88.09 KiB / 90.2 KB)
MacKeyboard / compressed w/ Stuffit
Mac OS 1.x - Mac OS 6.x
Note: Altough this app can be launched without crashing under Mac OS 7, 8 or 9, it does not produce any sound. Best used under Mac OS 6.0.8 on Mini vMac emulator or on a real 1980's Mac of course :)
Emulating this? It should run fine under: Mini vMac