Turntable A On-Air (Ctrl+1): Switches on/off the On-Air channel for Turntable A.
Turntable A Cue (Ctrl+2): Switches on/off the Cue channel for Turntable A.
Turntable B On-Air (Ctrl+6): Switches on/off the On-Air channel for Turntable B.
Turntable B Cue (Ctrl+7): Switches on/off the Cue channel for Turntable B.