Revision History: June 2nd 2021 - First release June 5th 2021 - Uppdated to run on Python 3.7 Description: Three programs are available here: synth6581.py This is an electronic musical instrument - it is a polyphonic multitimbral synthesizer that can handle up to 8 audio channels. It requires a MOS6581 IC wired to a Raspberry Pi according to the schematics. It is configured to use a KeyLab88 keyboard for input. Code can be easily modified to work with other keyboards and also other single chip synthesizers SID_multi_player.py Plays C64 songs on one or more SID boards Does not require a MIDI keyboard. Just a SID or two, or six. SID_multi_player_keys.py Plays C64 songs on one or more SID boards Knobs and sliders on a Keylab88 have been assigned to control delay, volume and pitch To compile the C library for the sid_driver.py file to use, type: gcc -Wall -pthread -shared -o sid_lib.so sid_lib.c -lpigpio Longer documentation will be available soon. The source code is extensively commented.