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Sound Interface Device
Developer: Unknown
Header: Custom
Content: Programmatic
Instruments: Combined
Target Output
Output - Digital Audio - No.png Output - MIDI - No.png Output - FM Synthesis - No.png Output - PSG.png
Released: c. 1987
First Game: N/A
  • *.mus
  • *.sid
  • *.psid

Sound Interface Device (SID) is an audio format that houses the sound code sent to the MOS Technology SID chip (6581) used by on the Commodore 64. SID files (sometimes called PSID to highlight that one file contain more then one track), are rips of the assembly programming from the ROMs of Commodore games. SID players emulate the Commodore CPU and SID chip hardware in order to playback the audio.

The overwhelming majority of SID files are mono, as one chip produce only mono sound. Some new music may rely on two or even three chips (so it's called 2SID/3SID), doubling or tripling the amount of channels to make aviable hard left/hard right sound or even add center track to them with 3SID. No one known game use this ability, only some Commodore 64 demos.

It's unknown who designed this format and when. The first program to operate with it was SID to WAV, designed in 1994, but Queen-Special demo proves that even in August of 1987 SID format was used to rip music from several demos and Highlander (C64) with Frantic Freddie 1983 (C64).






SID to ?

? to SID



All Commodore 64 games and programs can have their audio ripped to SID format.


The majority of popular Commodore 64/128 games have their music ripped to SID format, but this list includes games that either don't have a rip, or have an incomplete rip:

How to Obtain

Ripping SID files requires an intimate knowledge of MOS 6502 machine code and the 6581 SID chip, but luckily, most popular Commodore 64 games already have their sound ripped to SID format and can be downloaded:

  • - High Voltage SID Collection (unfortunately, published music is intermixed with amateur songs).