So I was linked to this awesome song, I heard it previously playing Zombie Master.
Now it has made its way onto my phone as a ringtone.
That got me wanting to mod out the old original GameBoy I have sitting around collecting dust.
Since I'm not ready for that yet, I found this cool website PulseBoy to emulate and allow creating tunes online.
Here is my testing mp3 and the source file (for reloading and editing).
It exports as wav, I just made the mp3 using a really old version of Cool Edit Pro I had lying around.