Applied Acoustics Systems Chromaphone 3 Upgrade Acoustic Object Synthesizer Plug-In (Download) - Manual (Page 44)

44 The Editor View
• Drumhead : circular membrane,
• Membrane : rectangular membrane,
• Open Tube : a cylindrical tube with both ends open allowing one to obtain the complete
harmonic series (even and odd harmonics),
• Closed Tube : a cylindrical tube with one end closed allowing one to obtain only odd har-
monics,
• Manual : In this mode, one can create a custom resonator by selecting up to four partials (see
Quality control). The rank of each partial is fixed using the Partial 1 to Partial 4 selectors.
The Mode Density control is located just below the resonator selector and it allows one to adjust
the number of modes taken into account in the synthesis and therefore the richness and complexity
of the sound. This control has four positions,
Low , Medium , High , Full , corresponding to 4, 16,
30 and 70 modes respectively. When the resonator is a Tube , this control is deactivated and all
modes are taken into account. Note that the CPU time required by a resonator is proportional to the
number of modes calculated; the higher the number of modes used, the higher the CPU load. In
the particular case where the
Manual resonator type is selected, this control is used to determine
how many of the four available partials will be used to form the resonator.
The reference pitch of a resonator, or in other words the frequency of its first partial,
is adjusted using the Pitch parameter. This control is composed of two numbers separated
by a dot. The first number indicates a value in semi-tones while the second one indicates
a value in cents (one hundredth of a semi-tone). When the semi-tone and cent controls
have a value of zero, the reference pitch of the object is the middle C of the piano (C4 =
261.62 Hz). The value of the reference pitch can be adjusted by click-dragging on the semi-tone
and cent controls. Double clicking on these controls brings back their value to zero.
The Key control determines how the pitch varies as a function of the note played on the key-
board. When this parameter is zero, the pitch does not vary and therefore it is the same whatever
the note played on the keyboard. When this control has a value of 1.00:1 (one semi-tone for each
semi-tone on the keyboard), the pitch of the object follows the pitch of the note played on the
keyboard or in other words, the pitch variation is tempered. Using values smaller or higher than
1.00:1 results in intervals smaller or greater than a semi-tone when adjacent notes are played on
the keyboard. The pitch can also be modulated using the signal from the
LFO module. The LFO
control is used to adjust the amount of gain applied to the signal from the LFO .
The Level and Rate controls are used to obtain a modulation of the pitch when a note is played.
The Level control is used to determine the amount by which a note is detuned when it is triggered.
The Rate control sets the amount of time before the note reaches its normal pitch. Note that the
value of the Level control can be positive or negative allowing the note to start above or below its
real pitch. It can also be modulated by the MIDI keyboard velocity. This adjustment is obtained
using the
Vel control.