Index - T
| Third | Music.Theory.Interval |
| thirtysecond_note | Music.Theory.Duration |
| thomas_young_1799_c | Music.Theory.Tuning |
| ThreeQuarterToneFlat | Music.Theory.Pitch |
| ThreeQuarterToneSharp | Music.Theory.Pitch |
| Tie_Left | Music.Theory.Duration |
| Tie_Right | Music.Theory.Duration |
| tmatrix | Music.Theory.PitchClass |
| tn | Music.Theory.PitchClass |
| tni | Music.Theory.PitchClass |
| to_cents | Music.Theory.Tuning |
| transpose | Music.Theory.Interval |
| transposeTo | Music.Theory.PitchClass |
| transpositions | Music.Theory.PitchClass |
| twelve_tone_equal_temperament_comma | Music.Theory.Tuning |