LP reproduction suffered hidden acoustical and resonance flaws beyond familiar noise

Evidence

Many audiophiles and even some studio professionals are unaware that their sound spaces have such characteristics. Low-frequency resonances of a relatively small room (see chapter 27), with anywhere from a half up to a few wavelengths from wall to wall, can be especially strong in the 30 to 100 Hz bass region. If you have ever heard a truck idling outside with an annoying response inside a room, you have listened to one of these resonances. Between the resonance frequencies, the bass response is actually reduced, as we know from the modeling clay, or “rob Peter to pay Paul” principle (see section 11.3). The low-frequency resonances can cause the most expensive system to sound muddy or boomy. — Eric J. Heller, Why You Hear What You Hear- An…, 1266 (#exemplifies, via linked claim)

Categorization

• XREF: connects to: Discrete quadraphonic LP technology improved conventional two-channel record quality.; LP’s own asymmetrical distortions confounded Johnsen’s polarity audibility experiment.; Reused master tapes corrupted early CDs, explaining poor CD-versus-LP comparisons (+4 more)

Related

• Room low-frequency resonances make expensive audio systems sound muddy or boomy (similarity 0.85)
• Discrete quadraphonic LP technology improved conventional two-channel record quality. (similarity 0.84)
• Resonances are the primary problem in loudspeakers (similarity 0.83)
• Recorded room ambience may distract listeners from evaluating raw loudspeaker quality (similarity 0.80)
• Room resonance excess masks loudspeaker bass deficiency to listeners (similarity 0.80)
• Reused master tapes corrupted early CDs, explaining poor CD-versus-LP comparisons (similarity 0.80)
• Loudspeaker resonances are the primary cause of poor sound quality. (similarity 0.80)
• Even anechoic rooms have a low-frequency operational limit (similarity 0.80)
• Multichannel reproduction progressively masks loudspeaker resonances except low-Q ones. (similarity 0.80)
• Equalizing only the low-Q resonance substantially improves subjective loudspeaker ratings. (similarity 0.79)
• The LP medium was fundamentally incapable of reproducing master tape sound (similarity 0.79)
• Reflections increase sensitivity to low and mid-Q resonances in reproduced sound (similarity 0.79)
• High-Q resonances are rarely heard but catastrophically audible when music hits their exact frequency (similarity 0.78)

Broader Connections

• Reflections increase sensitivity to low and mid-Q resonances in reproduced sound #corroborates (0.85)
• Recorded venue acoustics masked loudspeaker resonances that technical signals reveal #expands (0.80)
• Room low-frequency resonances make expensive audio systems sound muddy or boomy #exemplifies (0.78) — Eric J. Heller, Why You Hear What You Hear- An…, 1266
• Audible resonances drove low sound-quality ratings in early blind tests #corroborates (0.78)