Lexicon MC-1 A/V Sync Delay, Calibrate Panorama

MC-1 Digital Controller

ystem

Configuration

Once you have entered the distance to the nearest speaker, the MC-1

will automatically calculate the maximum allowable distance. The

display will show all of the speakers, each with a default distance setting

equal to your nearest speaker. Use SELECT and ▲ and ▼ to highlight

and enter actual distances for each speaker. The MC-1 rounds off

distance settings into discrete steps – choose the closest step to the

actual distance in these cases. If a speaker distance is further than the

MC-1 can accommodate, set it to the maximum allowable distance.

(This will vary, depending on your intial entry for NEAREST SPKR.)

A/V Sync Delay

A/V Sync Delay compensates for the delay that occurs when a video

processor, such as a scan rate converter, is used with the MC-1. Most

of these processors alter the original audio/video timing relationship by

adding delay to the video signal as it is processed. A/V Sync Delay

applies a corresponding delay to the audio signal to restore the original

audio/video timing relationship. It can also be used to compensate for

poorly mastered source material.

If your video material appears to be out of sync, engage A/V Sync Delay

in the LISTENER POSITION menu. With a video source running, adjust

the delay along its range with ▲ and ▼.

Note that it is best to use a non-film source when setting A/V Sync Delay,

as film dialog added in post production may have poor timing relation-

ships.

Calibrate Panorama

Panorama works by canceling the sound going from each speaker to

the opposite ear. Its effectiveness is highly dependent on the geometry

of your front loudspeakers, the room and your listening position. The

correct timing of the canceling signal varies with the relative angle

between your main speakers.

Find a mono source, such as an announcer on FM radio or a mono film,

and listen for a tightly focused center image of speech or singing. If the

image is off-center, adjust the MC-1’s input balance controls. (The more

centered the monaural image, the better Panorama will work.)

Select CALIBRATE PANORAMA from the Listener Position menu to

display a sub-menu that allows you to turn on a calibration noise source,

configure the speaker angle, and adjust the listener position.

CAL NOISE is a special digitally generated signal to aid in calibrating the

Speaker Angle and Listener Position parameters. Note that in all cases,

sound will actually be produced by both front loudspeakers. The

adjustments affect the

directionality of the sound.