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===== Decay =====
Refers in general to a steady reduction of volume until a note is inaudible. In terms of ADSR, refers to the length of time it takes for the signal to reach its sustaining volume from its maximum volume. ===== Delay =====An effect that delays an input signal by an amount of time before outputting it, often with a decaying feedback loop, simulating an echo. Can also refer to an actual echo or any other delayed signal.
===== Diatonic =====
===== Enharmonic =====
Two notes with different spellings are enharmonic if their pitches are identical. For example, F# {{s}} and Gb G{{b}} are the same pitch and thus enharmonic. Similarly, keys, chords, intervals, etc can also be enharmonic if they refer to identical pitches.
Simply because 2 notes are enharmonic does not mean they can be substituted in notation and retain the same meaning. For example, G is the V chord of the C Major scale, but Abb A{{b}}{{b}} is not, even though G and Abb A{{b}}{{b}} are enharmonic. This has no impact on how they actually sound, only how one would analyze the piece.
===== Equal Temperament =====
Equal temperament Temperament is a means of tuning the notes of an instrument, so that all notes are evenly spaced apart. This makes every key equally in-tune, although all intervals will be slightly off from their just intonation Just Intonation counterparts, which are more harmonic.
===== Flat =====