Brass for transient testing
I don't think you need to look too deeply into this subject searching for hidden meaning.
My intention was to merely establish a tongue-in-cheek point that a dedicated audiophile when presented with the real thing (live sound) may well reject it in favour of the nice easygoing, soft, safe, limited dynamics (in 1977) of reproduced sound. But if you are going to expose yourself to live sound, beware that it often doesn't sound as you may have been preconceived by exposure to hi-fi gear to sound. In particular, live sound has much less high frequency than you'd expect. And as he discovered, brass instruments have much more attack and edge.
In my view, if you want to challenge the loudspeaker's bass/mid cone material to see what transient performance it is really capable of, a good clean brass recording is what you need to arm yourself with and certainly not strings. It's the powerful upper harmonics you want to excite the cone with to hear if it turns them into heat, not sound.
Alan A. Shaw
Harbeth Audio UK