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...This 0.3 release on sourceforge is left for posterity.
https://github.com/karaokeresearch/singalong
Description:
Karaoke Research Council (KRC) is a totally free HTML/Javascript-based chord
reader designed for control via a foot pedal. The program that takes human-
readable text-formatted chord charts and generates HTML/Javascript-based chord
charts designed to be scrolled through hands-free during a live performance
using inexpensive USB foot pedals.
These charts are suitable for beginners and experts alike. ...