Herbie Flowers found that out a long time ago on Lou Reed's "Walk on the Wild Side"
Yea, no doubt!!! I guess I always fell to some type of a convention (i.e. must have 3 notes). That's where I say a big +1 to experimenting and listening to your inner artistic voice or whatever you want to call it.
Convention is great, but you can't break any ground that way, but I do believe it is needed in order to help that inner voice learn how to sing.
