I know its not quite marketing, being picky, I would like to see a tour ( video is best and quite easy to make these days ) of some of your features.
That a side.
You say you want to target musicians / small businesses. Start with musicians.
* Email owners of some of the smaller digital distribution sites. They can only turn you down. Or they could invite you to be their goto on twitter.
* Find out where musicians post music to help them be discovered or simply because they want to. Talk to them, be passionate about your system.
Im not going to sit and list off websites I suggest you approach as it might look a lot like spamming.
Maybe if you explain some of your current approaches and which are working and which are failing. Then maybe the "old crowd" can give pointers. Or equally learn from your mistakes, success.
On a side note, I would lose the spammers.