UD
A UD, or utonal division, is a kind of arithmetic and monotonic tuning.
A UD is a specific (rational) type of ELD.
undertone mode, or under-n scale (equivalent to n-UDO)
n-UDp: n utonal divisions of interval p
| quantity | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
|---|---|---|---|---|---|---|---|---|---|
| frequency | |||||||||
| pitch | |||||||||
| length |