I can hear sound from the a4 over overbridge but can’t set the volume or record audio from a4 . And i have a clavia nord lead 1 conected to the input of the a4 wich I can hear but don’t seem to be able to record the audio from it in ableton 
please help!
Hi! Check your overbridge settings and make sure you have it set to separate inputs from the A4. Then in Ableton you should have the plugin in one track and be able to select the plugin as an input source and record it on another track.
Hope that helps!