Specifications

DR. REX LOOP PLAYER
190
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 synthesizers; The Subtractor and the Malström, and in the samplers;
the NN-19 and the NN-XT. 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 syn-
thesizer, 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:
D In octave steps.
This is done using the Oct knob. The range is 0 - 8, with “4” the default.
D 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 fre-
quency 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 reset-
ting the transpose value to zero).
D In cents (hundredths 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 191). You can set negative or pos-
itive 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.
D 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:
D 24 dB Lowpass (LP 24)
Lowpass filters lets low frequencies pass and cuts out the high frequencies.
This filter type has a fairly steep roll-off curve (24dB/Octave). Many classic
synthesizers (Minimoog/Prophet 5 etc.) used this filter type.
D 12 dB Lowpass (LP 12)
This type of lowpass filter is also widely used in classic analog synthesizers
(Oberheim, early Korg synths, etc.). It has a gentler slope (12 dB/Octave),
leaving more of the harmonics in the filtered sound compared to the LP 24
filter.
D 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/Octave
roll-off.
D High-Pass (HP12)
A highpass filter is the opposite of a lowpass filter, cutting out the lower fre-
quencies and letting the high frequencies pass. The HP filter slope has a 12
dB/Octave roll-off.
D 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.