AMX Distributed Audio Controllers Delta Series Operation And Reference Manual page 64

Using Matrix Keypads
In the examples shown in FIG. 61, the source is first selected, then the channel, station, or track number
is entered for bring up the preset you would like to save.
Once the selection is playing, press the "dot/preset" button and the numbered position you want and
Delta stores the preset when you press and hold ENTER.
To recall that same preset on the same source, simply press the "dot/ preset" button and the numbered
position you want then ENTER.
FIG. 61 Setting Individual Source Component Presets - Examples
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Delta Series Audio Controllers