128:162:192:243
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| Harmonics | 128:162:192:243 |
| Subharmonics | 1/(243:192:162:128) |
| Intervals from root | 1/1 – 81/64 – 3/2 – 243/128 |
| Cents from root | 0¢ 408¢ 702¢ 1110¢ |
| Step intervals | 81/64, 32/27, 81/64 |
| Step cents | 408¢, 294¢, 408¢ |
| Prime limit | 3 |
| Genus | 35 (243) |
| Intervallic odd limit | 243 |
| Otonal odd limit | 243 |
| Utonal odd limit | 243 |
128:162:192:243 is a major seventh chord found in the 3-limit diatonic scale.
In meantone this chord is tempered together with 8:10:12:15, tempering the third and seventh by 81/80.