(There's no video for MPEG Audio for Macintosh 0.3.3 yet. Please contribute to MR and add a video now!)
MPEG Audio for Macintosh is a crude MP2 (or MPEG Layer II) audio file converter/player made by the creator of SoundApp and filled the gap for early 90's Macs before SoundApp came out and let Mac users convert and play almost any audio/video file format imaginable which rendered this early converter work obsolete, a message you could read on Norman Franke's website starting from around 1997.
What is MPEG Audio for Macintosh 0.3.3 ?
Based on maplay1.2 by Tobias Bading
MPEG-Audio-for-Macintosh033.sit (95.62 KiB / 97.91 KB)
MPEG Audio for Macintosh v0.3.3 / compressed w/ Stuffit
Architecture: 68K (68020 + FPU or newer for conversion and PPC for playback) + PPC (FAT)
At least 730KB of free RAM
Mac OS 7.x - Mac OS 9.2.2
Emulating this? It should run fine under: Basilisk II