Thanks for all of your support as we expand MCJukebox to the masses!
Following your feedback, we have implemented the following changes:

• Added volume support to API - your volume is multiplied by the volume requested by the user to get a final result.
• Added pan support to API - move sounds around in 3D space by specifying left and right values
• Stop music method - while there isn't currently a command, you can call JukeboxAPI.stopMusic to hault a track that is currently playing.

We've got plenty more planned, and as always, contact us at support@mcjukebox.net if you have any issues.