Delta-rational chord: Difference between revisions
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{{Interwiki | |||
| de = Delta-rationaler Akkord | |||
| en = Delta-rational chord | |||
| es = Acorde delta-racional | |||
| ja = デルタ純正和音 | |||
}} | |||
A '''delta-rational''' ('''DR''') chord is a [[chord]] that has integer ratios between frequency ''differences'' of some pair of intervals, called '''deltas''', with the intervals in question assumed to be between successive notes (Δ, capital delta, is often used to denote "difference"). | A '''delta-rational''' ('''DR''') chord is a [[chord]] that has integer ratios between frequency ''differences'' of some pair of intervals, called '''deltas''', with the intervals in question assumed to be between successive notes (Δ, capital delta, is often used to denote "difference"). | ||
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! colspan="2" rowspan="2" | Not JI, but isodifferential | ! colspan="2" rowspan="2" | Not JI, but isodifferential | ||
| style="white-space: nowrap;" | φ:(φ + 1):(φ + 2):(φ + 3) | | style="white-space: nowrap;" | φ:(φ + 1):(φ + 2):(φ + 3) | ||
| rowspan=" | | rowspan="8" | No, not all or none | ||
| +1+1+1 | | +1+1+1 | ||
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