We have put together a max patch that semi-generatively produces a soundscape for the installation, it chooses tones from a list by random, and also changes the pitch between two set variables randomly each time, to give more of a naturalistic output.
It also has space for more than one set of tones, and more than one atmospheric tone, once implemented these will be used for the changing nature of the installation.
https://drive.google.com/drive/u/0/folders/1-Q6KfpoYzorNYKFfgUlfjd44tB0qYEZW
^^ Link to Max patch and adjacent sound files