Adding Circle 2 into Ableton

Install Circle 2 from the Splice desktop client.

To get Serum up and running in Ableton you need to check Ableton's AU/VST settings.

Navigate to :

Ableton

Preferences

File and Folder

Make sure "Use AudioUnits/VST" are all checked and hit Rescan.  

Windows users will only have the option "VST Plugin Custom Folder", manually navigate to the location you installed Serum.