OtsAV has its own inbuilt software mixer console, which enables you to mix between the two OtsAV Decks just like a standard hardware mixer. You can manipulate the mixer with a mouse, or fire off a number of cross-fade sweeps with keyboard shortcuts. There is no reason to have a physical hardware mixer, unless you're also mixing other external sources in to your final mix, such as a microphone.
To display the mixer console,
click the 
on the toolbar
until the mixer
console is displayed in the centre
panel. You can use the Ctrl +
Tab keys to toggle the center
panel.
The mixer console has a range of automated cross-fader sweeps that can be fired off using the numeric keypad. For more information click here.
Mixer console
The top horizontal slider: This slider is the cross-fader slider. This slider is used to fade between decks.
The left vertical slider: This slider is the Deck A volume level control.
The right vertical slider: This slider is the Deck B volume level control.
Note: It is normally not necessary to use the Deck A and B volume level controls at all, since OtsAV elegantly handles the audio level control.
The Air button: This button switches the deck signal to the Air output.
The Cue button: This button switches the deck signal to the Cue output.