Sound.pitch read/write property
Get or set the sound pitch, number that controls the playback speed of the sound. A value of 1.0 means the sound will play at original speed.
This property default value is 1.0
Example
local audio = require "audio"
local ui = require "ui"
require "console"
local win = ui.Window("Music player", "single", 320, 200)
local file = sys.File("music.mp3")
win:status("Playing "..file.name)
local sound = audio.Sound(file)
sound.pitch = 1.5 -- Change the pitch of the audio
sound:play()
win:show()
while win.visible do
ui.update()
end