Propellerhead Reason - 1.0.1 Manual de operaciones descargar pdf (Pagina 140)

DR. REX LOOP PLAYER

138

Dr.Rex Synth Parameters

The Dr.Rex synth parameters are used for shaping and modulating the

sound of the REX loops. These parameters are familiar synth parameters,

similar to the ones in the Subtractor and in the NN-19 sampler. It is important

to remember that these parameters do not alter the REX files in any way,

only the way they will play back.

! These parameters are global, in the sense that they will affect all

slices in a REX file.

Oscillator Section

For a REX file, the audio contained in the slices are what oscillators are for a

synthesizer, the main sound source. The following settings can be made in

the Osc section of the Dr.Rex:

Setting the overall Pitch

You can change the pitch of a REX file in three ways:

➜ In octave steps.

This is done using the Oct knob. The range is 0 - 8, with “4” the default.

➜ In semitone steps.

This is done by using the Transpose knob below the waveform display, or

by clicking on the keyboard above the knob. You can raise or lower the

frequency in 12 semitone steps (+/– 1 octave). The transpose value can

also be changed via MIDI, by pressing a key between C-2 and C0 (with

C1 resetting the transpose value to zero).

➜ In cents (100th of a semitone).

The range is -50 to 50 (down or up half a semitone).

! To tune an individual slice, you select it and use the Pitch parameter

below the waveform display.

Osc Envelope Amount

This parameter determines to what degree the overall pitch of the REX file

will be affected by the Filter Envelope (see page 139). You can set negative

or positive values here, which determines whether the envelope curve

should raise or lower the pitch.

The Filter Section

Filters are used for shaping the overall timbre of the sound. The filter in

Dr.Rex is a multimode filter with five filter modes.

➜ You activate or deactivate the filter completely by clicking the Filter

button.

The filter is active when the button is lit.

Filter Mode

With this selector you can set the filter to operate as one of five different

types of filter. These are as follows:

➜ 24 dB Lowpass (LP 24)

Lowpass filters lets low frequencies pass and cuts out the high frequen-

cies. This filter type has a fairly steep roll-off curve (24dB/Octave). Many

classic synthesizers (Minimoog/Prophet 5 etc.) used this filter type.

➜ 12 dB Lowpass (LP 12)

This type of lowpass filter is also widely used in classic analog synthesiz-

ers (Oberheim, early Korg synths, etc.). It has a gentler slope (12 dB/Oc-

tave), leaving more of the harmonics in the filtered sound compared to

the LP 24 filter.

➜ Bandpass (BP 12)

A bandpass filter cuts both high and low frequencies, while midrange fre-

quencies are not affected. Each slope in this filter type has a 12 dB/Oc-

tave roll-off.

➜ High-Pass (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.

➜ 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.

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Propellerhead Reason - 1.0.1 Manual de operaciones Pagina 140

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Propellerhead Reason - 1.0.1 Manual de operaciones Pagina 140

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