Front-Rear Balance Factor
The Front-Rear Balance Factor control (6-6D) determines the amount of upmixed sound pushed to the
surround channels (analogous to the Surround Depth control in previous UPMAX versions). A value of 0
sends all audio to the Rear channels while a value of 1 sends no audio to the Rear channels. A value of 67
sends 33% of the audio to the Rear channels and keeps 67% of the audio in the Front channels.
Center Channel Gain
The Center Channel Gain control (6-6E) sets the volume of the Center channel created by the upmixer,
which is typically dialog.
Rear Channel Downmix Level
In order for a stereo downmix to render at the same level as the original stereo source that was upmixed, the
gain applied to the rear channels must be the inverse of the Dolby Rear Channel Downmix Level.
The Dolby standard Ls/Rs downmix level is -3dB, and so the Rear Channel Downmix Level control (6-6F)
should be set to +3dB. Changing this setting by a small amount (-3 to +3) from the recom3 setting
will not have a significant effect on the downmix, but can have a great effect on the upmixed presentation.
Front-High Crossover
The Front-High Crossover control (6-6G) adjusts the crossover point between the Front Left and Right
channels and the Front Height channels when upmixing to 5.1.2, 5.1.4, and 7.1.2 formats. The crossover is
very gentle and the effect of this control is subtle. The audio spectrum in the Front Height channels is
determined by a combination of this control and the Lows in Heights control (described below).
Side-Rear Filter Crossover
The Side-Rear Filter Crossover control (6-6H) adjusts the crossover point between the Left and Right
Surround channels and the Left and Right Back channels when upmixing to 7.1, 7.1.2, and 5.1.4 output
formats.
Side-to-Rear Gain LF
The Side-to-Rear Gain LF control (6-6I) adjusts the gain of the low-frequency content in the Surround and
Rear channels when upmixing to 7.1 and 7.1.2 output formats.
Side-to-Rear Gain HF
The Side-to-Rear Gain HF control (6-6J) adjusts the gain of the high-frequency content in the Surround
and Rear channels when upmixing to 7.1 and 7.1.2 output formats.
Rear Channel Boost
The gain of the Left Rear and Right Rear channels when upmixing is set by the Rear Channel Boost
control (6-6K).
