Function
Mixers do just that-- they take multiple the sound sources (e.g. mics) and mix them down (to usually a stereo pair) to then be amplified and go to the speakers so people can hear the result.

CMPC's Mixer
CMPC uses a Mackie 1604 VLZ Pro mixer (see below).  The mixer offers 16 individual channels -- i.e. where mics and other line level devices devices can be plugged in.  And, four sub-mixes.   See the "Controlling Mics" section to see how to enable/disable and control the volume of each mic-- the main function of the mixer and activity of the sound crew person.

FYI-- The sub-mixes are controlled by the right side faders (near the output).  We use one of them to control the volume of the mix going up to the up-front roll around rack up amplifier/speaker combination.

Markings
As you can see, we marked the mixer to show where knobs should be.  The color scheme of the markings are:
    Knob Locations:
    Red = Constant  (i.e., knob should stay turned to this position)
    Yellow = variable
 
    Buttons
    Blue = button engaged (down)
    White = button not engaged  (UP)

The sound crew person should always review the board's knobs and buttons to ensure they are in the correct position before running the board for a service.

Current Listing of the 16 Channels:
Channel 1   = Pulpit
Channel 2   = Choir Hanging mic Left
Channel 3   = Choir Hanging mic Right
Channel 4   = Choir Loft Right #6 (Piano)
Channel 5   = Choir Loft Right #8
Channel 6   = Choir Loft Right #5 or "C"  (see roll around desk info )
Channel 7   = Choir Loft Right #7 or "D"  (see roll around desk info )
Channel 8   = "A"
Channel 9   = "B"
Channel 10 = White Hand Held
Channel 11 = Yellow Hand Held
Channel 12 = Blue Lavaliere/Hand Held  (Note: Can only use either, but not both simultaneously)
Channel 13 = Black Lavaliere/Hand Held (Note: Can only use either, but not both simultaneously)
Channel 14 = Red Lavaliere (Note: Used for the Words with the Children)
Channel 15 = Purple Lavaliere
Channel 16 = Yellow/Green Lavaliere

****Note: We have out-grown our 16 channel mixer-- i.e. have more than 16 mics/connections.  Thus, until we add to/replace the mixer some dynamic changes (swap the mic connections coming into the mixer) may be employed.****