Instruction Manual

1388 Dialog Reference
Project Options dialog—Surround tab
Monitor with Bass Management
When enabled, a combox lets you specify one of the following cutoff
frequencies:
• 80 (Dolby consumer/DVD) (default)
•116 (DTS)
• 120 (Dolby pro/film)
• 180
Downmixing
• Center Level—Center channel content is distributed equally into left
and right channels of a 2-channel downmix with one of a choice of
three levels. Each level is how much of center is mixed into both left
and right. The alternatives are:
• -3 dB—This is the right amount to distribute into two acoustic
sources to reach the same sound power level, thus keeping the far-
field level (in the reverberant listening field, as is typical at home)
equal. This is the amount by which a standard sin-cos panner
redistributes a center panned image into left and right, for instance.
• -4.5 dB—Since -3 dB and -6 dB represent the extreme limits (of
power addition on the one hand, or of phase-dependent vector
addition on the other), an intermediate, compromise value was
seen as valuable, since the correct answer has to be -4.5 dB +/- 1.5
dB.
• -6 dB—This covers the case where listening is dominated by direct
sound. Thus, the two source signals add up by 6dB rather than by 3
dB, because they add as vectors, as voltages do, rather than as
power does.
• Surround Level—Surround Downmix Level is the amount of Left
Surround to mix into Left, and Right Surround to Right, when mixing
down from any surround-equipped format to 2 channel. The available
options are:
• -3 dB—The amount by which mono surround information, from
many movie mixes before discrete 5.1 was available, mixes down
to maintain the same level as the original.
• -6 dB—An amount that makes the mixdown of surround content not
so prominent, based on the fact that most surround content is not
as important as a lot of front content. This helps to avoid