Pioneer Dj DDJ-FLX10 4-Channel DJ Controller for rekordbox and Serato DJ Pro (Black) - Manual (Page 53)

Part names and functions
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18 SAMPLER CUE button
Outputs the sampler sound from the headphones.
• When using Serato DJ Pro, set [Sample Player Output Select] to [A] in
Serato DJ Pro.
19 MIC OFF, ON, TALKOVER switch
Turns the microphone on/off.

Read: Using a microphone (page 104)(page 151)
20 MIC (microphone) indicator

Read: Using a microphone (page 104)(page 151)
21 MIC EQ (HI, LOW) knobs
Adjust the sound from the [MIC 1] and [MIC 2] input terminals.
22 MIC2 LEVEL knob
Adjusts the volume of sound from the [MIC 2] input terminal.
23 MIC1 LEVEL knob
Adjusts the volume of sound from the [MIC 1] input terminal.
Don’t forcibly pull out the channel fader and crossfader knobs.
These knobs are hard to pull out and may break if pulled with
force.