Audio Damage Mangleverb - Manual (Page 9)

randomly determined shapes. The SHAPE knob changes the basic waveform in different ways, depending on
which waveform is chosen with the switch.
 If the SAW wave is selected, and the SHAPE knob is set to the middle of its range, the output of the LFO
rises and falls evenly between its lowest and highest values, creating a symmetric triangular wave. If you
rotate the SHAPE knob to the left, the LFO output rises more quickly and falls more slowly, creating what
is often called a sawtooth wave. If you rotate the SHAPE knob to the right, the LFO rises more slowly and
falls more quickly, creating what is called a ramp wave.
 If the PULSE wave is selected, and the SHAPE knob is set to the middle of its range, the output of the LFO
jumps between its lowest and highest values, staying for an equal period of time at both values. If you
rotate the SHAPE knob to the left, the output stays at its highest value for a shorter period of time. If you
rotate the SHAPE knob to the right, the output stays at lowest value for a shorter period of time. In
engineering terms, the SHAPE knob varies the duty cycle of the rectangular wave.
 If the SINE wave is selected, and the SHAPE knob is set to the middle of its range, the output of the LFO
varies smoothly between its lowest and highest values. The difference between a sine wave and a triangle
wave is that the triangle wave abruptly changes direction when it reaches its highest and lowest values;
whereas the sine wave gradually slows down, stops, and speeds up again when it changes directions.
Moving the Shape KNOB introduces an extra little wiggle in the middle of the sine wave without creating
any sharp corners in its shape.
 If the RANDOM wave is selected, and the SHAPE knob is moved all the way to the left, the output of the
LFO jumps to a random value, changing at a rate determined by the RATE knob. As you rotate the SHAPE
knob to the right, the output moves more slowly from one random value to the next.
These different wave shapes and the effects of the controls upon
them are easier to see than to read about, so Mangleverb
displays the LFO’s output in a pane centered in its controls.
You’ll find that the display is most useful at fairly low rates. If the
LFO is oscillating above about 5Hz the display can’t accurately
draw the shape of the LFO. Also, the display operates at a much
lower priority than the signal-processing portion of Mangleverb,
and hence is at the mercy of your computer’s ability and willingness to divide its attention between making
music and making pretty pictures. Glitches in the LFO display do not mean that there are audible glitches in
the LFO’s signal itself.