Manual
Page35
For example, pressing Channel Pair Selects 1/2 and 3/4 will result
in channel pairs 1/2 and 3/4 being selected, and all will sound in the
speakers. Pressing Channel Pair Select 1/2 again will de-select
channel pair 1/2, leaving channel pair 3/4 still playing in the speakers.
3. Dolby Detect: Enabling Dolby Detect means an incoming digital stream is
monitored for certain keywords called "Pa Headers." This method of
detecting Dolby streams is very effective, unless the stream has been altered
since being created. Alterations such as volume control, dither, and sample-
rate conversion will also scramble the Pa headers, making this detection
method unreliable. For Dolby Pa header detection, the minimum
recommended delay is 42 milliseconds. Longer delays will prevent more
clicks and pops during switches.
4. Non-PCM Detect: Enabling this Dolby detection method means the channel
status bits are examined to determine whether they indicate the stream is
non-audio. Unlike Pa detection, these bits are not affected by audio
manipulations. However, not all equipment passes or sets this bit correctly,
which may result in false detection or failure to detect.
5. Audio Delay: This will set the delay from the inputs to all outputs. Rotating
the Trim knob changes the Audio Delay from Off to between 4 and 170 ms.
This is mainly used to "lip-sync" audio produced by this monitor with video
monitors which may have a few frames of delay from video signal processing
algorithms. Adding delay also gives this monitor time to detect and mute
Dolby bitstreams. Thus, longer delays will result in fewer (or no) undesirable
noises when signals suddenly change from PCM encoding to Dolby encoding.