Example with SoundWrapper Class CreateJS

Hi i found this link in the internet about SoundWrapper class for SoundJS here is the link :

http://codetuto.com/2014/01/soundwrapper-class-for-soundjs/

fadein and fadeout seems not working can anybody help give the example how its done in Adobe Animate CC, maybe someone can give example with .fla file, thanks

great example i found is this Sound fade out  by @JoãoCésar