Yes, our basis in Antarctica makes for poor turn-outs at our live shows on Earth, but it is a conveniently remote location from which we can discretely launch and land our spacecraft...
As we increase our rate of travel towards the speed of light and beyond, the sound created by our instruments falls behind us, as the speed of sound is slower than that of light.
We continue to play, unable to hear the music we are creating, we act on instinct alone. This instinct is more of a sixth sense that one learns of during, and then hones throughout, their experiences in light speed and super-light speed travels.
In order to finally hear what we have produced we must go back in time by exactly reversing our course, and traveling backwards at a pace equal to that of our original journey.
Along the way the music starts to catch up. At the exact moment we hear sound we must come to a sudden and complete hault. At this point we continue back at a now constant rate based from the average speed of our original journey. We then record the relocated music as it comes to us backwards.
Once the recording is complete we may stop our travels, or continue, it matters not. As we "relocate" the music in reverse, we must reverse it to hear it in its original state.
The end result is Volume Battle.