Tube Amp/Distortion/Delay Combinations
Algorithm Reference-101
Tube Amp/Distortion/Delay Combinations
FXAlg #729: TubeAmp<>MD>Chor
FXAlg #730: TubeAmp<>MD>Flan
FXAlg #731: PolyAmp<>MD>Chor
FXAlg #732: PolyAmp<>MD>Flan
Mono distortion circuits in combination with moving delays,
and a stereo chorus or stereo flange
Allocation Units
:3 each
Each of these four algorithms offer a flexible chain of effects designed primarily for guitar processing. Each chain
offers a different combination of a 3-band tone control, tube-amp distortion drive, poly-amp distortion drive,
cabinet simulation, chorus, flange, and a generic moving delay. The entire algorithm is monaural with the exception
of the final chorus or flange at the end of each chain, which have one input and a stereo output.
At the beginning of each chain is a 3-band tone control authentically re-creating the response in many guitar
preamps based on real measurements collected by Kurzweil engineers. It is adjusted with the Bass Tone, Mid Tone,
and Treb Tone controls with values ranging from 0 to 10 commonly found on many guitar amps. The flattest
frequency response is obtained by setting Mid Tone to 10.0, and both Bass and Treb Tone controls to 0.0.
The tone controls are integrated with one of two types of preamp drive circuits: TubeAmp and PolyAmp. The
TubeAmp faithfully models the response and smooth distortion caused by overloading a vacuum tube circuit.
PolyAmp is closely related to the PolyDistort algorithm offering a brighter sound quality with more sustain. The
amount of distortion is controlled by adjusting the Tube Drive or Poly Drive parameter. High frequency energy
caused by distortion can be rolled off by using the Warmth parameter.
Following the distortion drive element is a cabinet simulator. The cabinet simulator models the responses of various
types of micÕd guitar cabinets. The preset can be selected using the Cab Preset parameter. The following is the list
of cabinet presets and their descriptions:
Basic
Flat response from 100 Hz to 4 kHz with 4th order roll-offs (24dB/oct) on each end
Lead 12
Open back hard American type with one 12Ó driver
2x12
Closed back classic American type with two 12Ó drivers
Open 12
Open back classic American type with one 12Ó driver
Open 10
Open back classic American type with one 10Ó driver
4x12
Closed back British type with four 12Ó drivers
Hot 2x12
Closed back hot rod type with two 12Ó drivers
Hot 12
Open back hot rod type with one 12Ó driver