The MOS Technology 6581/8580 ‘Sound Interface Device’ chip, aka the ‘SID’, was the sound generator chip used in the Commodore 64 home computer – the greatest selling home computer of all time. The SID, by the means of 3 wavetable oscillators, a real analogue multi mode filter, an ADSR and various cross modulation options, provided the soundtrack to a generations gaming and perhaps many peoples first exposure to real sound synthesis. The SID’s unique musical aesthetic has lasted well beyond the lifetime of the C64 re-imagined in standalone products such as the SID Station and with in the computer via sophisticated software emulation.

The SID GUTS now takes the legendary SID chip and tailors it into the eurorack modular environment. By use of a real SID chip the classic sound is taken in a new direction with the levels of direct and voltage control only a modular system can offer.

The SID GUTS provides a single ‘SID Voice’ to your modular. The charm and authenticity of the original sound is preserved with no attempt to ‘clean’ or reduce noise in the SID audio output.

An open source DIY version of SID GUTS is/was available through THONK. The source code and schematics of which are available in our Git Hub repository.

Note the original SID GUTS and SID GUTS DIY are long DISCONTINUED. Please see the much improved SID GUTS DELUXE.