Using 3 switches, I went to be able to turn on or off an audio sample in 3 different speakers. I've used a couple of these in the past, but I can't think of a way to get 3 audio clips to play. If I was only dealing with 2 speakers, a workaround might be to have a clip that plays audio in the right out when switch 1 is up, a clip that plays audio in the left out when switch 2 is up, and a 3rd clip that plays in both left and right outs when both switches are up. However, I can't think of a good implementation with 3 speakers, without buying at least two of the Adafruit shields.
Oh, and to further complicate things, the speakers need to be controlled wirelessly.
In summary. I have 3 switches. When a switch is on, a clip from an audio track starts playing in one of 3 wireless speakers.