Lencore n.Form: MPI-6 - Manual (Page 15)

section 2
2.8 | audio input adjustment
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Internal speaker source select (figure 1)-
The rotary selector switch can select the audio source to play over the internal speaker. The selector
switch has seven positions. The first (fully CCW) position is the off state. The other six positions will play
the audio source selected (1-6 CW) over the internal speaker.
Page on/off button (figure 5)-
Pressing the Page on/off button enables a page from audio input 6. The status LED will be on and solid
during the page. Pressing the Page on/off button again stops the page and the Status LED will turn off.
This can be used for trouble-shooting purposes.
See figure 7 for the overall I/O layout.