@JoeKun
"content owned by the user" - For songs that I imported from CD in iTunes before, I can't change speed of these songs. why?
It's in iCloud music library and I subscribe Apple Music. The song seems to wrong recognized as a song of Apple Music.
What is the "content owned by the user" ?
And I agree blue0615, pfvernon2 and florom.
Please reconsider the restriction for Apple Music. I have used this capability in my app since iOS 12. And many users use this feature.