From Video Game Music Preservation Foundation Wiki
|First Game:||Danger Freak (AMI)|
SMPL is a sample bank format and part of TFMX (The Final Musicsystem Extended) created by Chris Hülsbeck for the Commodore Amiga's Paula chip. Each SMPL file accompanies an MDAT file.
The official TFMX-Editor and most players use the smpl.* extension. DOS games use *.sam.
How to Obtain
SMPL files usually have to be manually extracted from game files, a process that is different for pretty much every game that uses them.
The SMPL format was originally identical to RAW with PCM encoding, 1 channel, and signed 8-bit integers. As macro commands were added, the driver overwrote the first 4 bytes with zeroes for non-looping samples, and 256 per voice with real-time generated samples.