Grass Valley Imagestore 750 v.3.0.1 - Manual (Page 160)

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Advanced Audio
Silence Detection
In this example, an Intuition XG provides a stereo audio voice-over embedded within an SDI fill
signal. Whenever the audio voice-over is present, it is mixed automatically into the background
audio. There is no need for that the Intuition XG to send any automation commands to the
Imagestore 750 to control the voice-over block.
Fig. 6-28: Imagestore 750 Configurator - Silence Detection example, external voice-over audio on SDI fill
Note: AES audio sources (such as EAS audio warning messages) can also provide the external
voice-over.
Duck level –20 Duck level (in dB)
Duck mode Individ-
ual mode Which channels are ducked when the voice-over becomes active.
‘Individual mode’ means each channel duck is individually con-
trolled. ‘Collective mode’ means that all channels are ducked
whenever any voice-over activity is detected.
Parameter Default Description
Table 6-7: Imagestore 750 Configurator - Audio AudioDuck parameters