I like so much your logo! It is simple and elegant and fits so well inside a square. You're using a lowcase R and a reversed uppercase F and that's ok to...
The unique problem I see is... It is not musical enough! I like composition is so great but I think a lot of people is going to see the logo and ask "what it represents"... I'm looking for something more musical ^^
If you could give a revision to it it would be so great!
Keep on that way, you're doing great! ♥