Sound reinforcement permits only milliseconds of delay while recorded reproduction tolerates seconds

Evidence

Since all physical systems are causal, the output is at least slightly delayed due to the finite speed of acoustic or electronic propagation of the signals. The permissible delay caused by a device may, in some sound reinforcement situations, be critical, and cannot exceed, say, 10 ms. However, when reproducing sound signals, for example when playing music from a recording, the delay can be seconds without major problems. Such a delay allows for the relaxation of the definition of perfect sound reproduction. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 495

Categorization

• DEFINE: Defines the practical delay tolerance distinction between live sound reinforcement and recorded reproduction — the key numbers (10 ms vs. seconds) are the takeaway.
• corroborated: 2 independent passages support this claim — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 495