Operation Manual

5.3 The FX View 31
5.3.3 Delay
The Delay module consists in a stereo feedback loop with a variable delay in the feedback. It is
used to produce an echo effect when the delay time is long (greater than 100 ms) or to color the
sound when the delay time is short (smaller than 100 ms).
The Delay knob is used to adjust the amount of delay, in seconds, introduced by the effect.
Turning this knob clockwise increases the delay. The Feedback parameter is a gain factor, varying
in the range between 0 and 1, applied to the signal at the end of the delay lines. It controls the
amount of signal that is re-injected in the feedback loop. In its leftmost position, the value of this
parameter is 0 and no signal is re-introduced in the delay line which means that the signal is only
delayed once. Turning the knob clockwise increases the amount of signal re-injected at the end of
the feedback loop and therefore allows one to control the duration of the echo for a given delay
time. In its rightmost position, the gain coefficient is equal to 1 which means that all the signal is
re-injected into the feedback loop and that the echo will not stop. In addition to this gain factor,
low pass filtering can also be applied to the signal re-injected into the feedback loop. The cutoff
frequency of this filter is controlled using the Cutoff knob.
The Pan knob is used to balance the input signal between the left and right channels. In its
leftmost position, signal will only be fed into the left delay line and one will hear clearly defined
echo first from the left channel and then from the right channel and so on. In its rightmost position,
the behavior will be similar but with the first echo coming from the right channel. These two
extreme position correspond to the standard ping pong effect but a a less extreme behavior can be
obtained by choosing an intermediate position. In particular when the Pan knob is in its center
position, an equal amount of signal is sent in both channels.
The output signal from the Delay module can include a mix of input signal (dry) and delayed
signal (wet). The Wet and Dry knobs are used to adjust the amplitude of each component in the
final output. The amplitude of each component is increased by turning the corresponding knob
clockwise from no signal to an amplitude of +6dB. Note that the Wet parameter is also adjustable
from the Play view.
5.3.4 Distortion
The Multi-Effect module includes three different types of distortion which are selected using the
Shape selector knob. The Warm Tube effect applies a smooth symmetrical wave shaping to the
input signal resulting in the introduction of odd harmonics in the signal. The Metal distortion is
similar to the Warm Tube effect but is slightly asymmetrical resulting in the introduction of even
and odd harmonics in the signal. The Solid State distortion applies an aggressive symmetrical
clipping to the signal thereby adding high frequency harmonics and resulting in a harsh sound.