An expression that evaluates to a text string and that is also the name of a digitized sound.

One of the following:

"Boing"                    "Uh-oh"

"ChuToy"                   "Voltage"

"Clink-Klank"              "Whit"

"Droplet"                  "Wild-eep"

"Glass"

"Indigo"

"Laugh"

"Logjam"

"Monkey"

"Pong"

"Purr"

"Quack"

"SimpleBeep"

"Sosumi"

"Submarine"

"Temple"