Ableton and Serato bridge the gap between music production and DJing with The Bridge. The Bridge requires Serato Scratch Live 2.1.1 and Ableton Live/Suite 8.2 or above. Open both programs at the same time with Rane hardware attached to activate The Bridge online.
The Bridge gives you turntable-style control of your own multitrack productions. Simply drag an Ableton Live Set to a deck in Scratch Live and use your turntables or CDJ to control the transport. Scratch Live enhances your productions with deck control, mixing, nudging and DJ style looping, while you can remix, mute/solo tracks, use virtual instruments, change drum patterns, manipulate audio, tweak effects and launch loops on the fly in Ableton Live.
Apart from your Scratch Live hardware, using an additional dedicated controller such as Akai Professional APC40, APC20, or Novation Launchpad opens up your game for more mixing, effects handling and for triggering clips.
If you're just getting started with Ableton Live, you'll want to go through the Ableton Live lessons, located inside the program in the Help View
Behind the scenes, Ableton and Serato have implemented a two-way communication link to connect the programs. The timing is tight and it doesn't matter which program you open first.