Handbook for Sound Engineers

VI Meters and Devices 1009

Figure 26-15. Surround Sound Analyzer screen views. Courtesy RTW GmbH & Co.KG, Cologne.

L

C

R

sL sR

L

C

R

sL sR

L

C

R

sL sR

L

C

R

sL sR

L

C

R

sL sR

L

C

R

sL sR

sR

L C R

Corr LP 300 HzsL 

1 LF +1

Center channel level indicator

(yellow line)

Switchable low pass filter for the

sL – sR correlator

Total Program Volume (TVI - Total

Volume Indicator). The area

enclosed by the lines is a measure

for the total volume level, the

spreading of the area across the four

quadrants is an image of the balance

of the sound characteristics. The

shapes of the lines show the

correlation level: a distinctive roof

for r towards + 1 a funnel for r

towards 1, a straight line for r

between 0.25 and +0.25. The

correlation level also is shown by

the different colors of the lines of

the phantom source indicators:

green (+1 to +0.25), yellow (+0.25

to 0.25) and red ( 0.25 to 1).

Moving bar indicators (PSI - Phantom

Source Indicator) showing the position

and width of the phantom sources

between L and R and between C–L and

C–R

Indicator showing the position of the

dominant sound event (dominance

vector)

Moving bar indicators showing the

position and width of the sidewise

phantom sources (PSI)

Scaled coordinate system for the sound

pressure level. The red mark refers to

the reference monitoring sound

pressure level like e. g. 78 dB(A)

selected in the peakmeter section and

to which the studio monitoring system

can be calibrated.

Moving bar indicators showing the

position and width of phantom

surround sources (PSI)

Correlation meter for the surround

channels sL and sR

Incoherent noise, same

level in the L, R, sL, and sR

channels.

A. Sine wave signal, same level

in the channels L, R, sL, and

sR, similar to a mono signal.

B. Same as B but with the

phase of the left channel

rotated through 180o

C.

The surround signal sL and

sR is mono.

A surround signal with a low F.

level of Center presence.

A surround signal with some E.

Center presence.

D.

Actual screens are in color.