I guess it’s because I use A4 as a sound card as well - and when I choose “Post FX”/“Pre FX” as an input for FX Audio channel - it actually just a channel with all the sounds in Ableton (including other channels).
Maybe there is something on the A4 itself I need to do?
I’ve disabled outs 1 to 4 and FX 1 to 4 in audio routing (otherwise I get double the sound - from A4 unit itself and from Ableton getting the sound from A4).
That’s how my control panel is looking right now. There is no to enable/disable any of inputs or outputs, and both input and output Mains are active it seams.
I don’t see any options besides Track 1L to Track 4L and Input L/Input R in
my DAW
Try to select another soundcard in the ableton preferences, and check if input main from a4 is available after ableton live restart. If you have no other sound card try windows sound, just to see if this solves the problem