Operation Manual

6.58 Phaser 117
+
Input Signal
All Pass Filter
feedback
mix
Output Signal
Fourth order
Figure 63: Phaser algorithm.
increased, these peaks become sharper. The functioning of the Phaser is very similar to that of the
Flanger module. The filtering effect is different however, since the Phaser module only introduces
rejection around two frequencies which, in addition, are not in an harmonic relationship.
0 dB
Amp
Frequency
Light effect (mix=0.1)
Medium effect (mix=0.25)
Strong effect (mix=0.5)
250 Hz 2435 Hz
Figure 64: Frequency response of a Phaser module. Effect of the mix between “wet” and “dry”
signal on the frequency response.
Tuning
The location of the first notch in the frequency response of the module is adjusted with the fre-
quency knob and is displayed, in Hertz, in the counter next to the knob. This frequency can be
modulated by using the second input of the module, the amount of modulation depending on the
adjustment of the depth knob. In the left position, there is no modulation and the frequency re-
mains fixed while in the right position, with a modulation signal varying between [-1,1] Volt, the