A capella groups can adopt just intonation, causing overall pitch to drift through keys

Related

• Only the octave stays perfectly in-tune in equal temperament (similarity 0.83)
• No keyboard tuning can make every key sound justly intonated (similarity 0.83)
• A cappella just intonation makes a group’s overall pitch drift across key modulations (similarity 0.82)
• A pianoforte with raised dampers can physically re-echo sung vowels via sympathetic resonance (similarity 0.82)
• Tenors need not tune their tracts because their pitch-to-formant ratio stays high (similarity 0.81)
• Singing in just intonation causes pitch drift when modulating through keys (similarity 0.80)
• Vibrato produces tremolo when harmonics sweep across resonant peaks (similarity 0.79)
• Pitch shifting can alter pitch without changing spectral character. (similarity 0.79)
• Absolute pitch precision is roughly ten times that of trained relative-pitch listeners (similarity 0.79)
• Just-tuned chord progressions predict key drift of a full semitone (similarity 0.79)
• Piano hammers and drumsticks produce repeated impacts creating non-linearity (similarity 0.78)