User manual

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Chapter 8 refereNCe: SyNth | 33

High Pass - HP

If HP is used, frequencies below the Filter Frequency setting will be at-

tenuated, frequencies above the cutoff will not be affected.

Band Pass - BP

A bandpass ﬁlter allows frequencies close the Filter Frequency setting

to pass, while frequencies above and below the cutoff will be attenu-

ated.

• The Filter Resonance sets the width of the frequency range that will

pass through the band pass ﬁlter.

Notch

A Notch ﬁlter is the opposite of the Band Pass ﬁlter, it passes most of

the frequencies unaltered, but attenuates those in a speciﬁc range.

• The Filter Resonance sets the width of the frequency range that will

be attenuated with the Notch ﬁlter.

Filter Frequency

The Filter Frequency is used for setting the cutoff frequency point -

where in the frequency range the ﬁlter begins to process frequencies.

This parameter can be Morph controlled.

The Image above illustrates three different Filter Frequency settings

using a low pass ﬁlter. The area to the left, up to the downward slope

indicates the frequencies that passes through the ﬁlter. The area to

the right of the slope are those frequencies that are reduced. Move

the slope to the left and the sound gets duller. The “humps” at the top

indicates a resonance setting. Ok, enough science.

KB Track

The reason for having a Keyboard Track switch is related to basic

acoustics. If you raise the pitch of a waveform, the harmonics naturally

raise in frequency. If the cutoff frequency is constant, the sound will be

perceived as getting “muddier” the higher up the keyboard you play. To

avoid this effect, use KB Track.

With KB Track turned off, the ﬁlter frequency setting is constant re-

gardless of where on the keyboard you play. When Keyboard Track is

activated, the ﬁlter frequency setting will be higher for higher notes.

Resonance

The Resonance parameter is used to further adjust the

characteristics of the ﬁlter. Increasing the Resonance

will emphasize frequencies around the cutoff frequency,

making the sound thinner. Further raising the Resonance

will make the sound resonant to a point where the

ﬁlter starts to self-oscillate and produce a ringing pitch.

Exactly where in the frequency spectrum this “ringing”

occurs, depends on the Frequency value.

Freq Mod 1 - LFO

By activating this feature the ﬁlter frequency will be controlled by the

low frequency oscillator, the LFO. The knob sets the amount of modu-

lation.

Freq Mod 2

This knob governs the amount of the second modulation source to the

Filter Frequency. By using this parameter, the Filter Frequency can be

controlled by the velocity of the keys you play if you turn it anti-clock-

wise from the 12 o’clock position. If the knob is set after 12 o’clock,

the Mod Envelope will modulate the Filter Frequency.

The Envelopes

The envelopes are used to “shape the sound” over a period of time,

from when you hit a key, to after the key have been lifted again.

Mod Envelope

The Modulation Envelope is a three-stage envelope used

to modulate the tone color over the duration of a note,

e.g. create a bright attack by modulating the ﬁlter in the

start of the note. The Mod Envelope has three stages:

Attack

Attack sets the time it should take for the envelope to

reach maximum level after you have pressed a key. Turn

the Attack knob clockwise to increase Attack time.

Decay

When the attack phase is over, and the key is still held down, the

envelope drops back to zero level or rests at the sustain level until the

key is released. Use the Decay knob to set the time this should take.

If the Decay time is set to the maximum, the envelope will remain on a

sustained level until the key is released.

Filter Frequency

Resonance = 10

Resonance = 0

Resonance = 3

Resonance = 7

Filter Frequency

Resonance = 10

Resonance = 0

Filter Frequency

Resonance = 10

Resonance = 0

Filter Frequency

Filter Resonance

Filter Frequency

Filter Resonance

Filter Frequency

Filter Vocal

Envelope range

Time

Filter Frequency

Resonance = 10

Resonance = 0

Resonance = 3

Resonance = 7

Filter Frequency

Resonance = 10

Resonance = 0

Filter Frequency

Resonance = 10

Resonance = 0

Filter Frequency

Filter Resonance

Filter Frequency

Filter Resonance

Filter Frequency

Filter Vocal

Envelope range

Time

Filter Frequency

Resonance = 10

Resonance = 0

Resonance = 3

Resonance = 7

Filter Frequency

Resonance = 10

Resonance = 0

Filter Frequency

Resonance = 10

Resonance = 0

Filter Frequency

Filter Resonance

Filter Frequency

Filter Resonance

Filter Frequency

Filter Vocal

Envelope range

Time

Filter Frequency

Resonance = 10

Resonance = 0

Resonance = 3

Resonance = 7

Filter Frequency

Resonance = 10

Resonance = 0

Filter Frequency

Resonance = 10

Resonance = 0

Filter Frequency

Filter Resonance

Filter Frequency

Filter Resonance

Filter Frequency

Filter Vocal

Envelope range

Time

Filter Frequency