[ClanOfNihil]

Finally someone came up with he idea of detecting chords. Well done.

[v_b]

The idea is not new but it is not that simple. A tone can be mapped to a frequency, this is basically what Tuner Apps are doing.

A Chord is built up by multiple Tones. There are a lot of techniques - some do it well others fail.

[IndySun]

So dry.