Sony HT-A9, Help Manual

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Note
Depending on the order in which you turn on the TV and the speaker system, the speaker system may be muted and [MUTING]
is displayed on the front panel display of the speaker system. If this happens, turn all devices off, then turn on the speaker system
after turning on the TV.
During [Sound Field Optimization], a measuring sound is output for about 1 minute.
The speaker system does not output sound until completing the wireless connection between the control box and four speakers.
If the control box and speakers are not connected automatically in step 3, reset the speakers.
5-025-234-11(2) Copyright 2021 Sony Corporation
Perform initial settings by following the on-screen instructions.
[ Language]
[ Sound Field Optimization]
[ Easy Network Setup - Start]
Once [Setup is complete.] appears, select [Finish].
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