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RE: This is why the live reference, attending live concerts, is paramount.

The problem is that the sound field is different on different seats in the same venue, as has been shown my measurements:

Meyer, “Directivity of the bowed stringed instruments and its effect on orchestral sound in concert halls”, J. of the Acoustical Society of America 1972, No. 6 (pt 2), p.1994
Takatsu, “Acoustical design and measurement of a circular hall, improving a spatial factor at each seat”, J. of Sound and Vibration 2000, p.263

This fact makes the live reference a moving target. Further, you don't know where the mikes are placed during the recording of e.g. a symphony. Add the fact that loudspeakers radiate very differently as compared to musical instruments. I for one, in view of the above, have put the idea of using live concerts as reference to rest.

Klaus

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