We’ve heard some of your songs on indiegamesmusic.com and they are awesome. We’d like to use some of them in a free open source game we’re making, with proper attribution to you.
Do you authorize? Thank you.
Hey, I found your site from random browsing. I don’t really comment on sites, but what you have here is something wonderful.
coda 
Hi coda,
We’ve heard some of your songs on indiegamesmusic.com and they are awesome. We’d like to use some of them in a free open source game we’re making, with proper attribution to you.
Do you authorize? Thank you.
Hey, I found your site from random browsing. I don’t really comment on sites, but what you have here is something wonderful.