Toa VM-3000 Series - Manual (Page 88)

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11.8.2. BGM setting items
[BGM selection]
Select BGM 1 or 2. Press the OK key to confirm the selected BGM output and commence BGM broadcasting.
(For details, refer to
"BGM Broadcasts" in "Making General Broadcasts" on page 25 .)
BGM 1, BGM 2 and OFF (default) Setting range
[Treble settings]
Perform treble settings.
+10 dB to –10 dB (Default: 00) Setting range
[Bass settings]
Perform bass settings.
+10 dB to –10 dB (Default: 00) Setting range