User Manual

Multichannel Monitoring Tutorial Booklet (M2TB) rev. 3.5.2
Masataka Nakahara : SONA Corporation
©2005 YAMAHA Corporation, ©2005 SONA Corporation
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3-8. Monitor alignment
In some cases, problems with the size or shape of the studio will mean that it is not possible to place all
speakers at an equal distance from the listening point.
Such problems can occur particularly when partially renovating a two-channel studio for multi-channel
support.
In general, the center speaker is placed closer than the L/R speakers, and next the surround speakers are
often placed closer.
Under such conditions, the following three monitoring problems can occur.
[Fig. 33] Monitoring errors caused by differences in monitoring distance
Distance
Time
0mm
8mm
30cm
1m
10m
0msec
0.02msec
1msec
3msec
30msec
Comb-filtering
Haas effect
X-over of SUB
Split
A
B
dB
f
A + B
L
C
R
LFE
(SUB)
LS
RS
L
C
R
LFE
(SUB)
LS
RS
1msec=1/1000sec
dB
f
Panning
Diffuse surround area
dB
f
e.g. 1
e.g. 2
e.g. 1) A = L, R, LS, RS B = C
e.g. 2) A = L, C, R B = LS, RS