I was about to ask for this. I'm sure there are even open source projects to even generate drone ambient on the fly.
For example, this open source app generates very pleasing brown noises and binaural beats: https://gitlab.com/axet/android-binaural-beats
I was about to ask for this. I'm sure there are even open source projects to even generate drone ambient on the fly. For example, this open source app generates very pleasing brown noises and binaural beats: https://gitlab.com/axet/android-binaural-beats