RTW SurroundMonitor 10600, Operating Manual

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RTW SurroundMonitor 10600 203
RTW SurroundMonitor 10660-VID
E 4.3.2 Examples for Surround Sound Analyzer Displays
Fig. E 4-10: Examples of displays in the Surround Sound Analyzer instrument (SSA),
also see
www.rtw.de/english/special/index.html for an interactive demonstration
1. Incoherent noise with same levels in the
channels L, R, LS and RS, set to the refe-
rence monitoring sound pressure level. In
each case the correlation is r = 0, phan-
tom sound sources are not locatable. 2. Identical sine wave signal with same le-
vel in the channels L, R, LS, RS. The corre-
lation is r = +1 (outward broken TVI lines),
the phantom sound sources (PSI) are in the
middle, similar to a mono signal. 3. Same as on the left but with the phase
of the left channel rotated through 180°. In
the channel pairs L - R and L - LS each the
correlation is r = –1, there are no phantom
sound sources locatable.
4. Surround signal with some Center pre-
sence (roof). A support microphone would
be too dominant. A dialog in relation to mu-
sic would be too quiet. The width of the PSI
lines of the C channel is a sign of coherent
signal parts in L and/or R (crosstalk). 5. Surround signal with a low level Center
presence (funnel). When recording music,
the intermixture of a support microphone
may enhance the perceptibility of the C
channel in relation to the channel L and R. 6. The widely outward broken TVI line bet-
ween LS and RS, no spreading of the PSI
line and the correlation level r = +1 in the
lower phase meter indicate that an identical
mono signal is applied in both surround
channels.
E 4 Display Modes • E 4.3 Surround Sound Analyzer Display