How to perform 'Async Get Audio Duration' in Racket.
; Task: Async Get Audio Duration
; Language: Racket
define async_get_audio_duration() (
; Implementation for Async Get Audio Duration
define result = ...; ; Initialize variable
; TODO: Implement core logic here
; Step 1: Prepare data
; Step 2: Process Async Get Audio Duration
displayln("Done");
)