Operation Manual

6.13 Bowed Plate 79
Velocity
The velocity knob is a gain knob acting on the velocity input of a Bowed Multimode object.
Noise
The noise knob is used to set the amount of irregularities in the bow structure.
Damping vs Frequency
In a mechanical structure, the damping, or decay time, varies for the different frequency compo-
nents of the oscillating motion. The variation of the damping with frequency is characteristic of
the material of a structure and is adjusted, in a Multimode object, with the damp/frq knob on the
module front panel. In the left position, the decay time of low frequencies is shorter than that of
high frequencies; in the right position the opposite holds. As a rule of thumb, steel and glass are
found in the left position; nylon in the center position; and wood in the right position.
Typical Use
A good module to drive a Bowed Multimode module is an ADSR.
Figure 34: Bowed Multimode driven by an ADSR
Note: see also Bowed Beam, Bowed Marimba, Bowed Membrane, Bowed Plate and Bowed
String.
6.13 Bowed Plate
The Bowed Plate module simulates sound produced by bowed rectangular plates of different ma-
terials and sizes. This module first calculates the modal parameters corresponding to plate shaped
objects according to the value of the different parameters requested at construction time and, next,
calls the Bowed Multimode module to simulate sound production by the plate. The module has
one output, the sound produced by the membrane, and three inputs. The first input signal is the
bow velocity in the direction of the motion. The second input signal is a force signal which is