Diatonic and chromatic - Wikipedia
https://en.wikipedia.org/wiki/Diatonic_and_chromatic
WEBIn ancient Greece there were three standard tunings (known by the Latin word genus, plural genera) of a lyre. These three tunings were called diatonic, chromatic, and enharmonic, and the sequences of four notes …
DA: 81 PA: 62 MOZ Rank: 98