Does anyone know if it's possible to run Ableton Live on the RPi? Version 9 of Ableton requires 4GB of RAM so I guess not, but version 7 needs 512MB of RAM. I thought it would be possible to run that on a RPi running Windows 10 Core. Any ideas?
You won't be able to run any version of Ableton. There are no packages available for ARM architecture CPUs. Windows IoT for the Pi isn't Windows as you know it - it can't run standard Windows applications and is intended more for embedded devices.
Even if it were possible to install Ableton, it would be a pretty miserable experience. The Pi's disk bandwidth wouldn't allow you to work with more than, being pretty optimistic, one or two tracks, and the CPU just isn't fast enough to process high quality audio effects at a reasonable pace.