6.7
Performance Parameters
61
6.6.6
The Body Module
The
Body
module simulates vibrations of the top plate of the body of the
guitar, or soundboard, and that of the air cavity of the body. The soundboard of
the body is efficient at radiating a large range of frequencies while the role of
the air cavity is to boost low frequencies. A
Tone
knob is provided for the plate
while a
Decay
knob is provided for both the plate and air cavity of the body.
The
Tone
parameter is used to control the decay time of high frequencies with
respect to that of low frequencies. This takes into account the fact that depend-
ing on the material, the decay time varies for different frequency components
of the sound. In its leftmost position, the decay time of high frequencies in
the sound is lower than that of low frequencies; in its rightmost position it is
longer. The overall decay time of the both the air cavity and plate vibrations is controlled with the
help of the two
Decay
knobs and it is increased by turning the knobs clockwise.
The
Size
selector knob allows one to control the size of the body. Basically, reducing the size
of the body, shifts its frequency response toward higher frequencies while increasing it, results in a
shift toward lower frequencies. Available sizes are very large(
xl
), large (
l
), medium (
m
), small (
s
)
and very small (
xs
).
6.7
Performance Parameters
6.7.1
Chord Display
The
Chord Display
is where
Strum
displays the name of the detected
chord or note and the corresponding voicing selected. Strings are labeled
from lowest to highest as follows:
•
String 6: E2 (MIDI note number 40)
•
String 5: A2 (MIDI note number 45)
•
String 4: D3 (MIDI note number 50)
•
String 3: G3 (MIDI note number 55)
•
String 2: B3 (MIDI note number 59)
•
String 1: E4 (MIDI note number 64)
Notes played are identified by a circle on the corresponding string and the position on the
fretboard is determined by the fret number appearing in the upper left corner of the display which
corresponds to the number of the first fret in the display. Strings that are not played are marked
with an ’X’ at the top of the chord display. When a string is triggered, its number is highlighted
at the bottom of the display while it vibrates. For a list of all the chords detected by
Strum
, please
refer to section 11.
