I have windows 8.1 with touch screen. I can download apps, like drums, piano, ect, and play them buy tapping the computer screen. how can I play them and record them on Audacity.
I don’t know that you can play them in Audacity, but you should be able to record them. It’s a cousin to recording YouTube and other streaming services.
Given Audacity is a Desktop app I think you will just single tap on Audacity’s Play or Record button but you will have to double tap to open Audacity, not just single tap. But you can change that in Folder Options so that single click (or tap) will open: