SID

File Format
Name	SID
Ontology	Electronic File Formats Audio and Music SID ; ; ;
Extension(s)	.sid
MIME Type(s)	audio/prs.sid
PRONOM	fmt/314, fmt/315, fmt/316

SID is a music format for the Commodore 64, named after the C64's SID chip.

It contains 6502 machine code, plus some metadata.

Resources

High Voltage SID Collection, a large collection of SID files, players and documentation
File format specification

File Format
Name	SID
Ontology	Electronic File Formats Audio and Music SID
Extension(s)	`.sid`
MIME Type(s)	audio/prs.sid
PRONOM	fmt/314, fmt/315, fmt/316