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ARTURIA – Wurli V – USER MANUAL 10
Supertramp – The logical song
Tori Amos – Pancake Van Halen – And the cradle will rock...
Wilco – I am trying to break your hear
Today it is quite hard to get a hold of this memorable electric piano in good
condition. They are sadly not the most frequently used keyboard instrument in the
music industry and are quite rare these days. Fortunately the Wurli V is here to give
it a second life, and allowing us the relief of tuning troubles!
1.2 Physical modeling synthesis
When you want to create a sound, there are many methods of synthesis from which
to choose:
 Additive, which creates a timbre by adding various waveforms together
 Subtractive, in which partials of an audio signal are attenuated by a filter to
reduce the original harmonic content of the sound
 Frequency Modulation (FM), where waveforms are used in
carrier/modulator relationships and tuned according to the harmonic series
to produce overtones in the carrier waves
 Wavetable, which offers a wide selection of digital waveforms and then
allows them to be layered, filtered, and/or used as the crossfade targets of
an X/Y controller or a looping envelope
 Sample Playback, where recordings of a sound are triggered by a playback
device, and can be transposed by increasing the playback speed when
different pitches are required
 Granular, which splits samples into very short “grains” and allows them to be
manipulated through a myriad of playback options, and
 Physical modeling. In this method the output waveform is calculated
according to a set of equations and algorithms derived through extensive
analysis of a physical sound source.
1.2.1 Music and math: yet another link
A physical model attempts to codify the laws of physics that govern a particular
form of sound generation. A model typically will have multiple parameters, some
of which are constants that describe the physical materials and dimensions of the
instrument, while others are time-dependent components representing the
player´s interaction with the instrument, such as plucking a string, pressing a valve,
or reducing the pressure of his embouchure, etc.
This idea has been around for a long time, but development has been hindered
until recently because processors that were powerful enough to handle the
computational complexity of the physical models either didn’t exist or were too
expensive.