Propellerhead Reason - 1.0.1 Betriebshandbuch PDF herunterladen (Seite 110)

SUBTRACTOR SYNTHESIZER

108

➜ Highpass (HP12)

A highpass filter is the opposite of a lowpass filter, cutting out the lower

frequencies and letting the high frequencies pass. The HP filter slope has

a 12 dB/Octave roll-off.

The darker curve illustrates the roll-off curve of the Highpass Filter. The lighter curve

in the middle represents the filter characteristic when the Resonance parameter is

raised.

➜ Notch

A notch filter (or band reject filter) could be described as the opposite of a

bandpass filter. It cuts off frequencies in a narrow midrange band, letting

the frequencies below and above through. On it’s own, a notch filter

doesn’t really alter the timbre in any dramatic way, simply because most

frequencies are let through. However, by combining a notch filter with a

lowpass filter (using Filter 2 - see page 109 in this chapter), more musi-

cally useful filter characteristics can be created. Such a filter combination

can produce soft timbres that still sound “clear”. The effect is especially

noticeable with low resonance (see page 109) settings.

The darker curve illustrates the roll-off curve of the Notch Filter. The lighter curve in

the middle represents the filter characteristic when the Resonance parameter is

raised.

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Propellerhead Reason - 1.0.1 Betriebshandbuch Seite 110