Propellerhead Reason - 4.0 Betriebshandbuch PDF herunterladen (Seite 234)

MALSTRÖM SYNTHESIZER

232

D Env (envelope)

If you click on this button so that it is lit, the cutoff frequency (see below) will be

modulated by the filter envelope. If you leave this deactivated, the Filter Envelope

will have no effect.

D Freq (frequency)

The function of this parameter depends on which filter type you have selected:

With all filter types except AM, it is used for setting the cutoff frequency of the fil-

ter. In the case of the lowpass filter for example, the cutoff frequency determines

the limit above which high frequencies will be cut off. Frequencies below the cutoff

frequency will be allowed to pass through. The farther to the right you turn the

knob, the higher the cutoff frequency will be.

If you have selected AM as filter type, this will instead control the frequency of the

signal generated by the filter. The same control range applies though; the farther

to the right you turn the knob the higher the frequency will be.

D Res (resonance)

Again, the function of this parameter depends upon which filter type is selected:

If the selected filter is any other type than AM, it sets the filter characteristic, or

quality. For the lowpass filter for example, raising the filter Res value will emphasize

the frequencies around the set filter frequency. This generally produces a thinner

sound, but with a sharper, more pronounced filter frequency “sweep”. The higher

the filter Res value, the more resonant the sound becomes until it produces a whis-

tling or ringing sound. If you set a high value for the Res parameter and then vary

the filter frequency, this will produce a very distinct sweep, with the ringing sound

being very evident at certain frequencies.

In the case of the AM filter type though, this control instead regulates the balance

between the original signal and the signal resulting from amplitude modulation.

The farther to the right you turn the knob, the more dominant the AM signal will be.

The Filter Envelope

This is a standard ADSR envelope with two additional controls; inv and amt.

The filter envelope is common for both filter:A and filter:B, and controls how the filter

frequency should change over time.

Inv (inverse)

This button toggles inversion of the envelope on and off. The Decay segment of the

envelope will for instance normally lower the frequency, but if the envelope is inverted

it will instead raise the frequency.

Amt (amount)

This controls to which extent the filter envelope affects the filters, or rather - the set fil-

ter cutoff frequencies. For example; if the cutoff frequency is set to a certain value, the

filter will already be opened by this amount when you hit a key on your keyboard. The

amount setting then controls how much more the filter will open from that point. Turn

the knob to the right to increase the value.

! For an overall description of the general envelope parameters (Attack,

Decay, Sustain, Release), please refer to the Subtractor chapter.

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