Operation Manual

6.26 Flute 94
The default value of the following parameters is set during construction
• delay: time delay, in seconds, applied to the input signal (values between [0, 92]ms).
• feedback: coefficient,[0, 1[, determining amount of “wet” signal re-injected into the delay
line. If feedback = 0 there is no “wet” signal re-injected while if feedback = 0.99, maximum
of “wet” signal re-injected.
• depth: gain coefficient, [0,1], multiplying the modulation signal. mix: amount of “dry” and
“wet” signal sent to output. If mix = 0 there is only dry signal while if mix =1, there is only
“wet” signal.
6.26 Flute
The Flute module simulates sound production by a flute having the geometry
of a recorder. This flute is simulated using models of the air flow in the em-
bouchure, wave propagation in the body of the instrument and note changes with
different combinations of open and closed keyholes. Since this module simulates
a real instrument, it also has the same range (C3 to G5). This module has 3 inputs
and one output. The first input is a gate signal, generally that from a Keyboard.
The second input is the driving pressure signal and is generally connected to the
output from an ADSR module, the output from a Breath Controller module or
the gate signal from a Keyboard module. Finally, the third input is a pitch signal
generally connected to the pitch output from a Keyboard. The output signal is
the sound produced by the instrument.
Four parameters can be adjusted while playing. The noise knob sets the amount of turbulence
noise in the sound. The tone knob controls the jet behavior which affects the tone color of the
recorder sound. The labium knob sets the position of the edge of labium of the recorder relative
to the jet. In its center position, the jet blows exactly in front of the recorder labium. Finally the
sharpness knob controls the sharpness of the edge of the labium (this parameter is adjusted by
recorder makers since it affects the color of the tone produced by the instrument).
Typical Use
Figure 48: A Flute module controlled with a Keyboard.