Add support for UI sound.

[pixelzoom]

Added at 10/14/21 quarterly planning meeting.

The plan is to add support for standard (common-code) UI components. There is no plan to add sound (or do sound design) for sim-specific components or actions (like dragging the lens, object, light source, or projection screen).

[pixelzoom]

This sim has 3 sliders, which are a central part of the UI. Reminder that sliders will not have sound until phetsims/sun#697 is addressed.

[pixelzoom]

Slider sound has been implemented by @jbphet, and it seems sufficient to support this sim. So support for UI sound is now complete and ready for review.

[arouinfar]

@pixelzoom the sim sounds good in master. The only thing that is potentially missing is a sound related to the tools and toolbox. In Waves Intro, there is a sound whenever a tool is picked up and released (including when removing from/returning to toolbox). I doubt this sound has been generalized, but it sounds very similar to the toggle button sound so perhaps we could use that instead.

@kathy-phet @ariel-phet what do you think? Should there be a sound related to picking up/releasing the tools? If so, what do you recommend we use?

[pixelzoom]

From the first comment in this issue:

There is no plan to add sound (or do sound design) for sim-specific components or actions (like dragging the lens, object, light source, or projection screen).

Rulers and position markers are in that same category of "sim-specific components".

But if you want to revisit that decision...

• Do we need a sound for press (and release?) of a tool, and its toolbox icon?
• Do we need a sound for press (and release?) on an Object?
• Do we need a sound for press (and release?) on the Projection Screen?

[arouinfar]

Thanks for the reminder @pixelzoom! I'm comfortable with sticking with our earlier decision -- I just couldn't remember if it had been discussed or not. In that case, I think this issue is safe to close.