I've wondered for awhile, what does "PV" stand for, anyway? I could understand "MV" (music video), but what's the "P?"
This gets back to the idea that there aren't any hard and fast rules about what a song must have. You'll find different people advocating for different lists of parts, and which parts a song will include could vary by genre also. If you're trying to make a song in a particular genre, it would help to research what kinds of instruments are commonly used in that genre. Otherwise, if you're trying just to recreate a sound that's in your head, what instruments to include is entirely up to you.The Bass lead Keys Pad and precussion are the base nessesities for a complete song?
the list of premium features is very long, and those are indeed premium features for both an uploader and a watching user:
also, I recommend this reddit page: