ClearOne comm CONVERGE SR 1212 - Manual (Page 76)

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Sound masking » is an amplifier out only feature consisting of three modes:
Off 1. : Disables the feature
Voice 2. : masking operates only in the range usually used when the target audio is vocal.
wideband 3. : masking operates throughout the audible range of the unit.
Filter • : Filters selected from the power amp channel are only applied to the amplifier. otherwise they
operate in any combination consistent with the processing channel filters.