When I started on YT I did nothing with the sound.

When I look at those vids today most of them have restrictions.
Either they have ads shown at the start or they are blocked in certain countries.

From the moment I started increasing or decreasing the pitch of the sound I practically had no bans because of the audio, no restrictions and no ads next to my vids.

Occasionally a tune with lyrics gets a copyright warning but the system YT uses to recognize this is not waterproof (or their database for this is minor) in my opinion since it's a very small percentage of all my vids with lyrics.