Understanding Major and Minor Chords
The difference between major and minor chords in western music is only the change in the middle note, when it is a triad. Triads are three note chords.
Hashing Algorithm in Ancient Indian Music System
The ancient Indian Carnatic Music system uses a Hashing algorithm similar to the ones used by modern search engines. The katapayadi hashing algorithm is used to map raga names to raga numbers.