We've built a sheet-music rendering engine in JavaScript/HTML5. It syncs real audio with sheet music and is intended to be the best way to learn a song.

Here's a quick video demo I made: http://www.youtube.com/watch?v=tq1go7Ld1Q4

Very nice program.

Would be great to incorporate learning tracks like treehouse -

let the user decide what songs they want to learn - and keep track of how they are doing on their goals

This is ridiculously awesome :) Bravo.

I would like to point out that this is more awesome than it even looks. Try selecting a portion of the song, in the usual way with your cursor.

Notezilla (http://www.notezilla.io/library) is similar. It, too, plays real audio synced with visible and interactive sheet music, but it is for classical and pop music instead of guitar music. It doesn’t support guitar tabs, and it has a smaller library, but everything in its library is free.

This is incredible, it's amazing to see this all running in the browser.

One nag, I didn't actually know I could scrub on the tabs until I clicked - have you thought about adding a grey-like highlight on hover? Either with the same bar or highlighting the notes under the mouse?

Incredible work guys. I signed up quite a while back and you have come a super long way! The site is looking great and the live sheet music is spectacular.

This is awesome.

As someone trying to learn to play guitar, being able to loop and 4 measures at a time to play along with is incredibly useful.

If you look closely while it loads: "Reticulating splines..." — best rendering messaging ever

This is awesome. Great job on this. Love seeing music and computing intersect!

This is one of the best products I've seen in a while. Mad props.

This works shockingly well on iOS.