Yamaha MTX Series Setup Manual page 76

 ID=01
 ID=02
If you store these settings as a different preset, you'll be able to easily switch to settings with a limited number of
microphones. In the example above, wireless microphones 9 through 11 are not used, so FBS is used on all of the wire-
less microphones (1 through 8) that are being used.
This completes settings in the offline state. Save the settings once again.
Example 3) Using cascade mode to add MTX input channels (analog connection)
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MTX Setup Manual