Consonance - a simultaneous combination of sounds conventionally regarded as pleasing

Consonance - a simultaneous combination of sounds conventionally regarded as pleasing.

Diatonic Scale - is a seven-note musical scale comprising five whole-tone and two half-tone steps, in which the half tones are maximally separated.

Equal Tempered Scale – a scale, in which every half step is exactly the same size in terms of proportion. An octave must have the ratio 2:1. There are 12 half-steps in an octave. Each half-step must therefore have a ratio of .

Even Tempered Scale – See Equal Tempered Scale.

Half Step – see Semitone.