Where can I find C/C++ algorithms for music recognition?
I think there is some question about what exactly you are looking for – there appears to be much information about “Optical Music Recognition” meaning the ability to do OCR (optical character recognition) style reading of a music score. This would convert the written, or my likely printed, music into a machine readable format (e.g. SCORCH) and then save it for easy editting – however, if you are looking for a way to process a file of music, then the above hit looks like it might be profitable for you. Best of luck.