Audio interface – Using auditory comments with Alexa?

I'm working on an Alexa skill, and we're doing several interactions that may require some kind of feedback while I wait or after a success.

I have not really seen any examples of whether or not to use auditory comments with Alexa. Do users expect to hear beeps and beeps? Ideally, I would like to use the color of the ring to indicate a success, but currently we can not do it.

Also, as a side note, does anyone know where to go for the UX sound clips?