Rane AD22S, Руководство пользователя

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4
Quickstart
FRONT PANEL CONTROLS
The first thing to decide is which alignment mode to use. If you’re using the AD22S to synchronize audio with video,
then select Video mode. Otherwise select Distance alignment. The Distance and Video buttons on the left hand side
of the unit switch between the two modes. Display settings and delay values are controlled by using the Channel
button to toggle between channels 1 or 2, and by using the Cursor buttons to select the value you wish to change.
The Coarse and Fine buttons increment or decrement the value currently selected.
DISTANCE ALIGNMENT
One of the main applications for the AD22S is synchronizing an audio signal coming from separate sources at two
different distances. Say, for example, you want the music emanating from a stack of loudspeakers on the lawn at an
amphitheater to get to your audience at exactly the same time as sound coming from the speaker arrays on stage.
The amount of delay needed is the time it takes sound to travel from the stage to the lawn. While in Distance mode,
this can be displayed in feet, meters, or milliseconds.
VIDEO ALIGNMENT
The AD22S is also excellent for synchronizing audio with video feeds, especially in a live environment where video
processing typically adds several milliseconds to the signal that can have a noticeable effect on the final output. To
assist in this application, the AD22S can show your delay value directly in terms of frames. All common frame rates
for NTSC and PAL/SECAM are supported, and the audio stream can be delayed with a precision of 0.5 frames to
line up perfectly with any video stream.
SETTING DELAY
Use the Cursor
◄
and
►
buttons to select the unit type, then press the Coarse or Fine buttons to cycle through
options. In Distance mode, choose between feet, meters, or milliseconds; in Video mode the delay is shown in
frames or milliseconds. If you know the distance between the sources you are summing, set the units for feet or
meters. The ambient temperature also affects the speed of sound. To set the temperature, use the Cursor buttons
to select either °C or °F, then set the value to the approximate temperature at your speaker location. The AD22S
calculates the correct delay based on your environment.
Note: Changing units from distance to time does not change the output delay. For example, if you are viewing the
settings for channel 1 in meters, a change from meters to milliseconds keeps the same amount of delay but shows it
in milliseconds rather than distance.
LINKING CHANNELS
The Link button connects the controls so that all changes apply to both channels. Channels do not need to share
the same setting. While linked, incrementing or decrementing a value changes the delay for both channels at once.
To treat the channels as a stereo pair, first set the delay value to the same setting on both channels before pressing
the Link button.
MEMORY FUNCTIONS
Each channel has two memory banks, A and B. The * character at the right of the display indicates that the current
setting does not match what is stored in memory. Press Store to copy the current settings into the selected
Memory, clearing the
* character. The cursor must be over the Memory Bank field before pressing Store. To activate
a stored setting, press Recall to change the active delay to the value stored in the memory location shown. If
channels are linked, both will be recalled.