Mackie 1640I User Manual

24

   Onyx 1640i

When this button is up, aux return 4 is routed to the 

main mix bus, just as aux returns 1-3 are. When the 
button is down, however, the aux return 4 stereo signal 
is routed to the CR / phones matrix instead. It does 
not matter if any of the source buttons [44, 45] are 
assigned, but it will be interrupted, as usual, if a solo 
button [41] is engaged.

Let's pretend that you are doing a live mix to a 2-track 

deck, a house PA, or both, and you want to play along to 
a click track. You could run the click track directly into 
the main mix, but you do not want the mixdown deck or 
the audience to hear it. Therefore, you may route it to 
the control room and phones output instead! Similarily, 
it may be used for voice-over tracks, narration, anything 
you want heard by the engineer and players but not by 
the audience and mixdown deck.

This green LED will turn on when the mixer is turned 

on, as a reminder of how on it really is. If it is not on, 
then it is off, and the mixer becomes a rather nice 
weight for keeping your morning newspaper from  
blowing away in the wind.

If it does not turn on, make sure the power cord is 

correctly inserted at both ends, the local AC mains   
supply is active, and the power switch [2] is on.