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Harlem SID

from Shakebit by Inverse Phase



Track written in: Custom environment and CyberTracker 1.01
Chip found in: Commodore CBM-II, 64, 128, MAX
Other names for chip: MOS 6581

Channels: 3, each with selectable waveform or combination
4-bit volume, 16-bit pitch
Quirks: can adjust gain of unused input line to create fourth channel

The SID was invented by Bob Yannes, a chip designer at MOS/Commodore who later went on to co-found Ensoniq, the synthesizer company. The chip was loaded with excellent filters and oscillator/pulsewidth controls. The SID went through several revisions (where you can find an "R" after the chip number) and eventually had a second release as the MOS 8580 ("6582"). The 8580 had more "predictable" filter control that behaved more within the original spec, although some prefer the "grittier" sound of the original chip.


from Shakebit, released April 1, 2013


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Inverse Phase Baltimore, Maryland

Chiptune/8-bit music and indie game composer. I also run an electronic entertainment museum called Bloop.

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