Big Blue Manual
August, 2019
Shape
The shape parameter changes between four oscillation modes.
Sine Wave
provides a smooth sounding tone, and is the fundamental building block of sound. A sine
wave provides a single frequency with no harmonics.
Triangle Wave
provides two sloping sides with a sharp peak. Triangle waves provide a sharper sound
with harmonics at the inverse square of its harmonic number. This means that a triangle wave at 100Hz
would provide harmonics at 300Hz with an amplitude of 1/3ˆ2 (0.1111), 500Hz, 700Hz, etc.
Sawtooth Wave
provides a sharp ramp followed by an immediate drop. This is characterized by a more
brassy
sound. The harmonics are equal to the inverse of its harmonic number, meaning that a 100Hz
tone will be accompanied by a 200Hz tone at 1/2 the amplitude, a 300Hz tone at 1/3 the amplitude,
etc.
Square Wave
provides an oscillation of on and off, at equal intervals. These give a warm sound, but not
as clean as a sine wave. Square waves provide odd harmonics at the inverse of its harmonic number.
Thus, a 100Hz square wave will provide a 300Hz harmonic at 1/3 the amplitude, 500Hz at 1/5 the
amplitude, etc.
Octave
The
Octave
parameter allows you to specify octaves above or below the current octave.
This allows for you to adjust the octave to be up to
5
octaves above and
5
octaves below the current
octave.
The octave that is selected is displayed by the three LEDs above the button, with
Green
being octaves
above, and
Red
being octaves below.
Lights
Octave
Off Off Off Current Octave
Off Off On One Octave Above or Below
Off On Off Two Octaves Above or Below
Off On On Three Octaves Above or Below
On Off Off Four Octaves Above or Below
On Off On Five Octaves Above of Below
Mix
The
Mix
parameter allows for you to choose the volume at which the VCO or external input is
when mixed into together.
SV Modular
6