How To Use External Audio Effect In Ableton Tutorial by Reid Stefan Realest Puppet In The Game. Routing Audio between Ableton and Analog gear is simple with the External Audio Effect stock plugin. All you need is an audio interface with multiple stereo inputs and outputs and you can chain any outboard gear into ableton and use it like a plugin! Pedal Used in this Demo: Meris Mercury 7 Uad Apollo 8 Other favorite pedals of mine: Ibanez ts808, Way Huge Supa-Puss, Meris Polymoon, MXR Sub Machine