Linear Acoustic UPMAX ISC, Руководство пользователя

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Figure 6-4 - Center Width controls
Auto-Detect Controls
When the Input Format is set to Auto-Detect, the UPMAX ISC continuously monitors the input signal to
determine its format and will automatically switch between upmixing to the selected Output Mode and pass-
through.
The level at which the detector circuit determines that the incoming signal is program audio (and not noise
or silence) is set by the Auto-Detect Threshold control (6-5A). The proper setting depends largely on the
quietness (or noisiness) of channels that are not muted but also contain no audio. Set too low, it may cause
a false trigger to upmix; set too high, it may cause a late transition to upmixing. The default value of -70dB
should work well for modern production while values as high as -63dB may be required for noisy sources.
The amount of time in milliseconds a signal must stay above the Auto-Detect threshold before the unit
begins upmixing - or below the threshold to cease upmixing - is determined the Input Switch Transition
control (6-5B). A value between 10ms and 12ms is a good starting point for most material.