QRS Virtuoso Violin

The bow moves across the string, causing it to oscillate

A waveform generator drives the Virtuoso Violin "string blade," which then oscillates at the frequency of that wave.

The string oscillates at a frequency dictated by its length. The string's length is determined by the placement of the performer's fingers on the fingerboard.

Driving the string at 440 cycles per second produces an "A"; at 220 cycles per second, the string produces an "A" an octave lower; and so on. No fingering is needed to alter the frequency and the string blade never requires tuning.

The stick-slip action of the bow on the string first pulls, then releases the string, causing it to oscillate. (The action is similar to that of a skidding car tire grabbing the road-the stick--and subsequently skidding-the slip.)

The bow interacts with the string blade in the same way it does in a real violin, producing a true violin sound.

To play the violin louder, the performer typically bows faster and adds pressure to the bow movement.

The Virtuoso Violin increases the volume by increasing the amplitude of the wave driving the string blade and by increasing the bow speed

The performer's action moves the bow, determining its angle, pressure and speed.

The Virtuoso Violin uses a servo motor to control the bow angle and a DC motor to control the bow's speed and direction. The electronically driven blade experiences the same bow resistance that causes a traditional string to vibrate. To overcome that resistance, two rare-earth magnets are placed around its core, creating a strong electromagnetic force.

The resulting vibrations move from the string to the bridge to the body of the violin.

Two dummy strings and the string blade hold the bridge in place. The vibrations move from the string blade to the bridge to the body of the violin.

As the vibrations move through the violin, the body resonates with those vibrations, creating the unique violin sound.

Similarly, as the vibrations move through the Virtuoso Violin, the body resonates with those vibrations, creating the unique violin sound.

Since no two violins are identical, each will have unique sound characteristics

As with the traditional violin, subtle variations in the violin body will produce a slightly different sound

The performer's experience, skill and emotions determine how the violin is played.

The Virtuoso Violin uses a Standard MIDI (Musical Instrument Digital Interface) file as the software-control language with custom controllers added for bow speed and direction. The angle is created automatically with an internal algorithm.

The QRS Virtuoso Violin was created by Fred Paroutaud of Paroutaud Music Labs in Los Angeles. Unable to obtain a good violin sound from electronically sampled and synthesized sounds, Paroutaud, a professional musician, developed the Patented String Driver technology to produce an authentic violin sound. This electronic creation of a real violin sound breaks new ground in music technology.


The string blade between the magnets with the bow running across it. Notice the carbon fiber bow to prevent changes due to climate conditions.

The string blade and the strings attached to the bridge.

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