I want to dynamically populate a MIDI AUDIO track's clips section with a bunch of mp3s in a folder that change hourly.
I want to create a GUI where I can tune the frequency of how often new clips are loaded into the MIDI AUDIO track's clips section.
Is this possible with Ableton Live's Developer SDK? does this even exist? If not, is there another more accessible DAW for this type of custom GUI work?
You can create custom GUIs using Max for Live.
You can't, however, add mp3 files to a MIDI instrument's clips, even manually. Audio files such as mp3s can only be added as clips to Audio tracks. MIDI instruments can only be added to MIDI tracks, and the clips on MIDI tracks must be MIDI clips.
Unfortunately, Max for Live does not yet provide a way to programmatically add audio files as clips even on audio tracks. So, I'm afraid you can't implement this with Ableton Live.