For a complete HD studio, the Roland VR-4HD AV Mixer is the perfect system that replaces several different pieces of complex A/V equipment, specifically designed to be operated by a single person. The VR-4HD AV Mixer enables easy switching and mixing of sound and video when using advanced video and audio Digital Signal Processing along with the dedicated hardware controls, faders, buttons and touchscreen interface. The beauty of the Roland VR-4HD AV Mixer is that it integrates a video switcher, digital audio mixer, multi-viewer touch screen and USB video/audio streaming interface into a stand-alone device – which is perfect for sports, training sessions, corporate events and any other live event.