Yao’s

DAP关于环绕声的一个贴心tip：

Before putting up any microphones its wise to have
a judgement of the acoustics of the recording
environment, to know the character of the music to
be recorded and the size of the orchestra. These 3
factors shall decide your position and the mike
spacing in the main set and also how many spot
mikes to be used. My main mike set up for main
room pick up is the Decca Tree array, with two
Outriggers to pickup the sides.
The Decca Tree is an array of equally spaced omni
directional microphones positioned over the
conductor. For film music the mikes on the back bar
would point between the first stands of violin and
cello .For classical music the back bar will normally
come out a little farther.
The spacing of the tree microphones is somewhere
between 90 and 150 cm and the height somewhere
between 3.50 - 4.90 meters.
Its is quite obvious to hear the differences even with
small chances within 10-20 cm in height. You need
a little time to find the right balance between direct
and ambient sound.
The three microphones on the Tree is DPA 4006, so
are the two outriggers .The mikes holds the light or
the black grids and they are angled a little down in
the orchestra.
Spot mics are used when the acoustics or the piece
of music needs it. It is normally music with a lot of
percussion.
The spot mics used for strings are DPA 4021 and
DPA4011 for woodwinds and percussion.
The LS and RS mikes will be placed app. 10 meters
from the frontline of the orchestra, it has to reach
the diffuse sound area.
The LS and RS are two spaced 4011 or in an ORTF
setup.