"Ruud Broens" wrote in message


First: studio recording of acoustical instruments result
in music registrations --what's your hangup with 'concert
hall noise floor' as being in some way relevant with such
a registration? Self-noise of competent microphones is
below 20 dB SPL, eg. AT 3035 - a USD 200 job - states 12
dB SPL eq. noise level

While $200 will get you a mic with a 12 dB SPL noise figure,
no amount of money will get you a concert hall with 100
people in it that has a 12 dB SPL noise floor.

Close miking just about anything will quickly get you in
the 110+ dB SPL
range, so a 100 dB range is possible for sure.

Ignorance of concert hall noise floors, particularly those
with people, even just the musicians in them, noted.

Of course
this also depends on the lowest acoustical level
attainable from the instrument/environment . Directional
microphones / noise gates, etc. are used to minimize
mechanical noise, f necessary.

The noise floor of a concert hall is usually quite
pervasive. Furthermore, its pretty much guaranteed that the
noisiest part of the room is where the people are, even if
its just the musicians.

The master recording's dynamic range can, depending on
composition, etc., very well be in excess of 90 dB.

It just doesn't seem to happen.

I believe it was DBX claiming a 100 dB requirement for
the recording of acoustical instruments' performances.

I guess you haven't figured out that vendor claims and the
fact can be slightly divergent at times.

A lot of recordings are said to be made without compression
or gain riding, and I see no reason for so many people to
lie about it. If you look at actual recording, the dynamic
range pretty well peaks out below 75 dB.

Second: many types of music don't use acoustical
instruments, or exclusively so, yet also do not start out
as amplified music, so another straw man there noted.
Electronically generated signals can have pretty much a
dynamic range that is limited by the electronics used,
that is *well over
100 dB*.

Again, your ignorance is showing. While electronic
instruments may create sounds over 100 dB, their dynamic
range is often quite less. I routinely record electronic
keyboards for example. They often have noise floors that are
only 60-70 dB down. Remember, they have analog circuitry in
them as well, even if the notes are generated digitally.