>its just that

It's not just that. OP's title is "I've built a tool for musicians using mod..."

1. The title is highly inaccurate. It's not a tool for musicians, it's for a specific subset of musicians (like you say).

2. The OP got a front page listing on HN. He missed a golden opportunity explaining things. He probably got a lot of musician visitors that found it interesting, but just got confused and left.