Glass Instruments from Vienna Symphonic Library is a sample-based virtual instrument featuring four unique glass instruments that produce sound either by rubbing individual glass elements, or by blowing across a bottle opening. Invented in 1761, the glass harmonica consists of hemispherical glass bowls which rotate around a horizontal axis driven by a pedal, with the sounds produced by touching the rotating glasses with moistened fingertips. Today, the glass harmonica is a rarity, with only ten professional players estimated world-wide.
Similar to musical glasses, the verrophone features chromatically tuned glass tubes that are rubbed with moistened fingers, but are also struck with mallets. The lingering, atmospheric sound is highly sought after by modern composers due to its intensity. Musical glasses embody one of the oldest forms of making sounds with glass by utilizing several custom-made wine glasses. To obtain different pitches the glasses are filled with varying amounts of water, with the instrument presented here providing a G3 to G6 chromatic range. The glass instruments collection is rounded off by bottles, which are blown with articulations such as sustains and flutter tonguing.