20
Here side channels are derived from the front and rear on each side. The percent of front and rear are adjusted using the Main Trim pots.
The 6 dB cut equalizes the levels.
Center Channel Downmixing
Center channel issues are special. The center channel was first developed by Dolby to allow voices to sound like they were coming from
the characters in a movie watched on a small TV set. With a stereo system and small TV, the voice track moved back and forth with the
action. The sound stage of the audio system was perhaps 6 feet wide but the TV only 2 foot wide. The characters did not stay in the
picture. In such a case, a center channel is useful. Now we consider a wide screen home theater with a projector and large screen. Now
the audio and video stages match and a center speaker focuses the voices right in the center of the screen even when they are not. In this
case elimination of the center speaker is advantageous.
There are two ways to downmix the center channel. First, by going into the Player setup menu, the center speaker can be turned off. The
center track is downmixed into the front channels. A better way is by using the AUX channels. The center is blended with the fronts right
at the output. The center output is not used and can be used as a second sub channel. The big advantage with this setup, is that the center
A2 A1 S C LRRR LF RF
In In In In In In In In A2 A1 S C LRRR LF RF
Out OutOut Out OutOut Out Out
1
2
3
4on
L Main
Trim 6 dB cut
Low Pass
Filter
1
2
3
4on
1 R Main
2 R Rear
3 Aux C
4 Aux S
AUX. 1
R Main
Trim 6 dB cut
Low Pass
Filter
1
2
3
4on
1 R Main
2 L Main
3 Aux C
4 Aux S
AUX. S
6 dB cut
Low Pass
Filter
1
2
3
4on
1 R Main
2 L Main
3 Aux C
4 Aux S
AUX. C
6 dB cut
Low Pass
Filter
1 L Main
2 L Rear
3 Aux C
4 Aux S
AUX. 2
Home Theater - with Blended Monoand Stereo SubsMono
Sub
Stereo
Sub
A2 A1 S C LRRR LF RF
In In In In In In In In A2 A1 S C LRRR LF RF
Out OutOut Out OutOut Out Out
1
2
3
4on
L Main
Trim 6 dB cut
Low Pass
Filter
1
2
3
4on
1 R Main
2 R Rear
3 Aux C
4 Aux S
AUX. 1
R Main
Trim 6 dB cut
Low Pass
Filter
1
2
3
4on
1 R Main
2 L Main
3 Aux C
4 Aux S
AUX. S
6 dB cut
Low Pass
Filter
1
2
3
4on
1 R Main
2 L Main
3 Aux C
4 Aux S
AUX. C
6 dB cut
Low Pass
Filter
1 L Main
2 L Rear
3 Aux C
4 Aux S
AUX. 2
Home Theater - with Blended SidesBlended
Sides
A2 A1 S C LRRR LF RF
In In In In In In In In A2 A1 S C LRRR LF RF
Out OutOut Out OutOut Out Out
1
2
3
4on
L Main
Trim 6 dB cut
Low Pass
Filter
1
2
3
4on
1 R Main
2 R Rear
3 Aux C
4 Aux S
AUX. 1
R Main
Trim 6 dB cut
Low Pass
Filter
1
2
3
4on
1 R Main
2 L Main
3 Aux C
4 Aux S
AUX. S
6 dB cut
Low Pass
Filter
1
2
3
4on
1 R Main
2 L Main
3 Aux C
4 Aux S
AUX. C
6 dB cut
Low Pass
Filter
1 L Main
2 L Rear
3 Aux C
4 Aux S
AUX. 2
Home Theater - with Downmixed Center