You are right about things at the outset. The only way the clumsy phrase works in any fashion is if the object of disbelief is live music. Ron's robot said: "In the context of high-end audio, suspension of disbelief occurs when the listener becomes so engrossed in the musical experience that they forget they are listening to a reproduced sound rather than a live performance. "
As you notice, now it is getting slippery in order to "Save the Phrase". Now we get: "I think this" [the reference to hearing live music] "treats the concept too literally. It is an abstract concept, not a literal description." Or the wierd deflection 'it's colloquial." The usual wagons are circling. Fun to watch
