6 Jan
2004
6 Jan
'04
9:10 a.m.
--- Steve Harris <S.W.Harris(a)ecs.soton.ac.uk> wrote:
On Mon, Jan 05, 2004 at 06:33:23PM -0800, R Parker
wrote:
Absolutely.
In physical rooms, the closest thing to having no
acoustic source is the "Dead Room" with a flat EQ
response and .1 reverberation. They are designed to
not influence the EQ response and reverberation times
of acoustic sources.
In theory and practice no acoustic source or a source
from a .1 room is very useful during the mixing stage
because the engineer controls the type of room that
the source appears to be within. The intent is to have
the ultimate amount of control over the mix. Dead
Rooms and synthesized sources help create that
circumstance.
Of course reverbs are then used to define the most
diserable room and because the source is absolutely
"dry" there's a great deal of flexibility available to
the mix engineer.
Ron
I don't understand how impulse response (IR)
works. I
know you fire off a sound/impulse and then the
response is used to tell calculate the properties
of
your room. Will IR tell me that the
average/desirable
Sabin value from 20Hz to 4KHz for a .3
reverberation
time in a 17X14X7 room is 148.6?
An impulse response is just a /very/ large FIR
filter, one way they can be
created is by a physical analysis, but thay can also
be generated
synthetically. With an IR impulse its possible to
capture and recreate any
linear (ie. non- non-linear) process, within reason.
I see what your saying about reverb and so on v's
having a good room in
the first place, but not all audio has an acoustic
source. - Steve
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