Propellerhead Reason Specifications Page 127

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MALSTRÖM SYNTHESIZER
125
D To activate/deactivate a filter, click the On/Off button in the top left
corner.
When a filter is activated, the button is lit.
An activated filter
Filter types
To select a filter type, either click the Mode button in the bottom left corner or
click directly on the desired filter name so that it lights up in yellow:
D LP 12 (12 dB lowpass)
Lowpass filters let low frequencies through and cut off high frequencies.
This filter type has a roll-off curve of 12dB/Octave.
D BP 12 (12 dB bandpass)
Bandpass filters cut both high and low frequencies, leaving the frequency
band in between unaffected. Each slope in this filter type has a 12 dB/Oc-
tave roll-off.
D Comb + & Comb –
Comb filters are basically delays with very short delay times with adjustable
feedback (in Reason controlled with the Resonance knob). A comb filter
causes resonating peaks at certain frequencies.
The difference between “+” and “–” is in the position of the peaks, in the
spectrum. The main audible difference is that the “–”-version causes a bass
cut.
The Resonance parameter in both cases controls the shape and size of the
peaks.
D AM
AM (Amplitude Modulation) is often referred to as Ring Modulation. A Ring
Modulator works by multiplying two signals together. In the case of the Mal-
ström, the filter produces a sine wave which is multiplied with the signal from
osc:A or osc:B. Resonance controls the mix between the clean and modu-
lated signals. The Ring Modulated output will then contain added frequen-
cies which are generated by the sum of, and the difference between the two
signals. This can be used for creating complex, non-harmonic sounds.
Comb + Low Resonance Comb + High Resonance
Comb – Low Resonance Comb – High resonance
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