Tritone

[Rodgers-PAC-Lab]

This PR adds:

• A new sound of type Tritone
• An argument "highpass" to the sound Noise which permits it to be optionally highpass-filtered

If "highpass" is left blank, then Noise will function just as before.

See also https://github.com/wehr-lab/autopilot/issues/165

[Rodgers-PAC-Lab]

I just remembered we're supposed to submit PRs against dev, not against main ... will redo