The sound engines – Erica Synths PERKONS HD-01 Drum Machine Synthesizer User Manual

Page 8

ALGO

MODE

VCF

Each voice of the Pērkons consists of 11 identical

controls – 8 potentiometers and 3 toggle switches,

but the sound generation algorithms for each voice

are different – please refer to the table below. Please

note that all controls in the VOICE section are

scanned and their positions can be saved as KITS so

you can recall them and replicate the sounds you

have created.

The LED on top of each voice indicates the outgoing

signal of the voice.

The

ALGO switch

selects one of three sound design

algorithms.

The

MODE switch

selects one of three operation

modes within the selected sound design algorithm.

The

VCF switch

selects analogue voltage controlled

filter (VCF) modes – highpass (HP), bandpass (BP)

and lowpass (LP) respectively.

The

TUNE knob

sets the initial tune of the voice.

The

DECAY knob

sets the decay time of the percus-

sion sound. Each voice and algorithm within the voice

may have different decay time settings. Once set all

the way clockwise (10) the voice turns into a drone

oscillator – in the maximum decay setting the voice

oscillates even if the sequencer is stopped.

The

PARAM1

and

PARAM2

knobs control different

parameters depending on the algorithm selected.

Please, refer to the table below.

The

CUTOFF knob

controls the cutoff of the VCF.

Please note that each VCF mode may have a

different cutoff knob response. The low-pass filter will

be fully open with the CUTOFF knob all way clockwise,

while the high-pass filter will be fully open with the

CUTOFF knob all way counter-clockwise.

The

DRIVE knob

is the Dry/Wet control for the

analogue overdrive circuit – with the DRIVE knob all

the way counterclockwise, the overdrive circuit is

bypassed, while with the DRIVE knob all the way

clockwise all signal flows through overdrive circuit

and maximum overdrive is engaged.

The

FX SEND knob

determines how much of the

signal is routed to any connected external FX unit or

to the built in BBD if no external FX is connected.

The

LEVEL knob

sets the volume of the relevant voice.

THE SOUND ENGINES