There are two supported audio configurations in Transitions DJ: internal mixing and external mixing.
In internal mixing mode, audio from the the two decks is mixed in software. The output of the internal mixer is sent to the output device. This is the default configuration.
External mixing sends the output from the two decks to two separate output devices, unmixed. In this configuration, it is possible to connect a hardware mixer by connecting each deck to a separate mixer channel.
NOTE: Recording is unavailable when using external mixing.