Perfect sound reproduction requires an LTI system with unity transfer function

Evidence

Perfect reproduction of sound can be defined in terms of the transmission channel, by requiring that it is an LTI (linear and time-invariant) system where any input waveform is repeated perfectly at the output. For this ideal case, the transfer function H(jω) = 1 (see Section 3.2.1). In practical audio we may relax this definition of perfect sound reproduction. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 494

Categorization

• DEFINE: Establishes the formal definition of perfect sound reproduction as LTI with transfer function equal to 1.
• corroborated: 2 independent passages support this claim — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 494