Why this exists, how it's built, and how players actually use it — on the practice-room floor and on stage.
I've been a professional guitarist for about ten years, and I still am. Three years ago I also started learning to code. JammLab is a browser-based chord chart tool that plays back real instrument samples, and it came out of a problem I had back when I was still a student. I wanted to practice improvising over very specific chord progressions, with real-sounding backing tracks, and there was no good way to do it. So I built one.
