The seventh harmonic gives an organ mixture a reed-like timbre
Evidence
A mixture such as the “pedal mixture” shown in the table would produce a strongly reed-like sound due to the presence of the flattened twenty-first (the seventh harmonic). — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1566
Categorization
- XREF: Links to the earlier discussion of harmonic content determining perceived timbre. — connects to: Having all harmonics up to the fifth or seventh also shapes timbre — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1477; The unresolved seventh harmonic imparts reedy timbre to instruments like the clarinet — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1478; Pipe organ stops can reinforce non-octave harmonics to reshape timbre (+16 more)
Broader Connections
- The unresolved seventh harmonic imparts reedy timbre to instruments like the clarinet
#corroborates(0.95) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1478 - Timbre reduces to a weighted ratio of fundamental and resolved versus unresolved harmonics
#expands(0.95) - Pipe organ stops can reinforce non-octave harmonics to reshape timbre
#expands(0.85) - Bright timbres stem from strong energy in harmonics above the seventh
#contradicts(0.85) - Harmonic amplitudes shape timbre and loudness but not pitch.
#complicates(0.85) — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1195 - Dark or dull timbres lack energy in harmonics above the seventh
#qualifies(0.85) - Organ pipes exemplify both reed and flue wind-instrument sound sources
#expands(0.85) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1133 - A principal organ pipe’s first two harmonics dominate its spectrum
#expands(0.85) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1436 - Harmonic content alone produces recognizable, describable timbre qualities
#expands(0.85) — Eric J. Heller, Why You Hear What You Hear- An…, 2202 - Organists shape timbre by selectively reinforcing harmonics of one series
#expands(0.80) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1526 - An oboe-like timbre is reproduced by four harmonics with exponentially decreasing amplitudes
#expands(0.75) — Dijk, Pim van, Physiology, Psychoacoustics and…, 5290 - Organ pipes’ timbre arises from resonances cooperating with edge tone
#qualifies(0.75) - Organ pipes begin notes one brief harmonic above their sustained pitch
#qualifies(0.75) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1446 - Chiff-voiced organ pipes begin with the second harmonic leading by about 30 ms
#qualifies(0.75) — David Howard, Jamie Angus, coustics and Psychoacoustics, 1470 - Spectra of only odd harmonics produce a clarinet-like timbre
#expands(0.75) — David Howard, Jamie Angus, coustics and Psychoacoustics, 3014