I want to start by saying that I really like this idea, and the amount requested is fair. The designs are great, and it seems like a great use case for noun-ish DAOs.
However, a few things are missing from the proposal that I think should be covered.
1. There's a revenue split element. I love this, but we should know what that split is before dispensing funds.
2. The branding, design, and positioning of the app seem to make sense, but there might need to be a bit more elaboration on how you're going to get people in the music industry to pick it up and start using it.
3. Again 20 ETH seems fair, but I don't think we should yeeting the entire amount right off the bat. This is something I think the DAO should figure out for larger project-based proposals, but milestone releases or a stream make more sense to me.
It looks like the proposal will pass, but if it doesn't, I would highly recommend resubmitting it and addressing the issues mentioned above.