You can change the volume on Nova by using the volume slider located on the the right side of the frame.
To increase the volume, place your finger at the bottom of the of the volume slider, push down, and slide your finger upward.
To decrease the volume, place your finger at the top of the of the volume slider, push down, and slide your finger downward.
In each case, you will hear a tone to confirm your command. To turn off audible feedback, toggle off the Interface Sounds-> Volume Sounds:
The lights on the sides of Nova will cascade upward for a volume up swipe, and cascade downward for a volume down swipe. You can also control the volume using the Soundwall App, or the device streaming to your Nova. Click here for details.