Hello beanstalker, it seems your BBB is not booting from SD... try to follow this order:
1) plug the power off
2) keep pressed the USER/BOOT button ( it's called "Boot Switch")
3) plug the power connector in while keeping the button pressed and wait for 20 secs
You should see all the 4 blue leds on for a while, then all off and then an activity. That means that the boot with RuneAudio was successful.
Let me know if it works.