Assertion: chord | /r/MadeOf | the tritone interval
Facets:
Source sentences:
text: Some 4-voice chords are used in traditional, 'classical' and church music but others such as the diminished seventh were strictly forbidden in early sacred music as they contained the tritone interval; the mathematical halfway point in the octave which acquired the name diabolus in musica (the Devil in music) due to its dissonant qualities.