You may need to map the faders on your mixer to allow SoundSwitch to mix your light shows.
For example, if you are a Serato DJ user with any of the Rane SL interfaces or the Denon DS1 interface or you wish to mix using all four decks on your controller or mixer, you will need to use the External MIDI mapping feature.
For Denon SC5000 users who are not using the Denon DJ X1800 mixer, you will also need to map a MIDI capable mixer using the External MIDI mapping feature.
To do so, navigate to the MIDI window and select the "External Mixer" tab.
Right Click to map each fader
Right clicking the on screen fader will highlight the fader red indicating its wait for MIDI
Move the fader on your mixing hardware to map the psychical fader to the on screen fader
Once successfully mapped the onscreen fader while highlight blue and will react to the movements of the physical fader
Repeat until all faders are mapped.
Check out this video fo more information: