A pseudo-octave, pseudooctave,[1] or paradoxical octave[2] in music is an interval whose frequency ratio is not 2:1 (2.3:1[1] or 1.9:1, for example), that of the octave, but is perceived or treated as equivalent to this ratio, and whose pitches are considered equivalent to each other as with octave equivalency.
- ^ a b "Interview with Max Mathews", p.21. Author(s): C. Roads and Max Mathews. Source: Computer Music Journal, Vol. 4, No. 4, (Winter, 1980), pp. 15–22. Published by: The MIT Press.
- ^ "The Paradoxes of Octave Identities", p.213. Author(s): Jenő Keuler. Source: Studia Musicologica Academiae Scientiarum Hungaricae, T. 40, Fasc. 1/3, (1999), pp. 211–224. Published by: Akadémiai Kiadó.