Spector Violin Mute 10-packs are optimized for dealers with rental fleets. They provide savings on each purchase, plus the added convenience of being sold without individual packaging. Whether to minimize sound for smaller performances, practice quietly, or play a muted part, the DAddario Spector Violin Mute is the best way to reduce volume. Initially designed by Fred Spector, 45-year veteran violinist of the Chicago Symphony Orchestra, this compact violin practice mute fits between the A and D strings of the violin and is easily engaged by simply sliding up over the bridge. While not in use, it slides back down and remains on the instrument.