How do you fade out in Ableton 11?
Toggle the “Automation Mode” button on the top right of your screen - when selected, you can edit automation, when not selected, you can edit clip fades.
How do you fade a MIDI track in Ableton?
Hover the mouse icon over the audio clip that you want to fade so that the fade-in and fade-out handles appear (if they don't appear, press 'A' on your keyboard, and they will appear). You then left-click on the handle that you want to fade and hold down on the mouse as you lower the fader.