Early listening tests required repeated short passages heard through every loudspeaker.

Evidence

By then I had learned that bed sheeting is not acoustically transparent and that music passages should be short and repeated so that more meaningful comparisons can be made. Every musical passage needed to be heard through every loudspeaker. This meant that a “disc jockey” was needed to perform the tedious task; it was the LP era. — Toole, Floyd E, Sound reproduction- the acoustics and…, 72

Categorization

• XREF: Methodological lesson about controlled A/B testing that parallels ABX testing and audio reviewing practice today. — connects to: Familiar repeated test music reveals loudspeaker flaws that unfamiliar excerpts cannot — Toole, Floyd E, Sound reproduction- the acoustics and…, 1139; Repeated familiar program excerpts make the most effective listening-test stimuli.; Subjective listening tests require repetition and randomization to be statistically valid — Toole, Floyd E, Sound reproduction- the acoustics and…, 144
• yield-rescued: below the book’s yield-target cutoff, included anyway for connecting to: Familiar repeated test music reveals loudspeaker flaws that unfamiliar excerpts cannot — Toole, Floyd E, Sound reproduction- the acoustics and…, 1139; Repeated familiar program excerpts make the most effective listening-test stimuli.; Subjective listening tests require repetition and randomization to be statistically valid — Toole, Floyd E, Sound reproduction- the acoustics and…, 144