1. The seventh tone in diatonic scale in solfeggio.

2. The fourth tone of the diatonic scale in solfeggio.

3. Music the first note of a diatonic scale.

4. The first note of a diatonic scale; the keynote.

5. These diatonic scale frequencies are encoded in each segment of the crop circle and can be played on the piano.

6. Diatonic seventh chords use the notes of the diatonic scale to add a seventh above the root to triads.

7. The ascending diatonic scale is the scale going up by step from lower to higher frequencies or pitches.

8. The absence of a tonal center and of harmonies derived from a diatonic scale corresponding to such a center; lack of tonality.