$SoundDisplayFunction
gives the default setting for the option DisplayFunction in sound functions.
Examples
Wolfram Research (1991), $SoundDisplayFunction, Wolfram Language function, https://reference.wolfram.com/language/ref/$SoundDisplayFunction.html.
Text
Wolfram Research (1991), $SoundDisplayFunction, Wolfram Language function, https://reference.wolfram.com/language/ref/$SoundDisplayFunction.html.
CMS
Wolfram Language. 1991. "$SoundDisplayFunction." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/$SoundDisplayFunction.html.
APA
Wolfram Language. (1991). $SoundDisplayFunction. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/$SoundDisplayFunction.html