Rocktron Prophesy II - Manual (Page 41)

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Application Notes: Rotary
The Rotary effect included in the Prophesy has been designed to provide the most realistic
simulation of an actual rotary speaker as possible. However, the nature of the rotary effect requires
a significantly higher amount of processor power than any of the other effects included in the
Prophesy in order to implement it without sacrificing the quality of the effect.
As a result of this, it is important to note that using all three modulation effects (rotary, flanger,
chorus) and the phaser effect simultaneously can result in an overload of the Prophesy's internal
processor—causing a significant hum and loss of sound quality. For this reason, it is recommended
that simultaneous usage of all three modulation effects is avoided to greatly reduce the chances of
this condition occurring.