Operation Manual

DR. REX LOOP PLAYER
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Setting Number of Voices - Polyphony
This determines the polyphony, i.e. the number of voices, or slices, Dr.Rex can play si-
multaneously. For normal loop playback, it is worth noting that slices sometimes “over-
lap”. Therefore, it is recommended that you use a polyphony setting of about 3-4
voices when playing REX files. If you are “playing” slices via MIDI, the polyphony set-
ting should be set according to how many overlapping slices you want to have.
! Note that the Polyphony setting does not “hog” voices. For example, if
you are playing a file that has a polyphony setting of ten voices, but the
file only uses four voices, this won’t mean that you are “wasting” six
voices. In other words, the polyphony setting is not something you need
to consider if you want to conserve CPU power - it is only the number of
voices actually used that counts.
Audio Quality Settings
These two parameters provide ways of balancing audio quality vs. conservation of
computer power.
High Quality Interpolation
When this is activated, the loop file playback is calculated using a more advanced in-
terpolation algorithm. This results in better audio quality, especially for loops with a lot
of high frequency content.
D High Quality Interpolation uses more computer power - if you don’t need
it, it’s a good idea to turn it off!
Listen to the loop in a context and determine whether you think this setting makes
any difference.
! If you are using a Macintosh with a G4 (Altivec) processor, turning High
Quality Interpolation off makes no difference.
Low Bandwidth (BW)
This will remove some high frequency content from the sound, but often this is not no-
ticeable (this is especially true if you have “filtered down” your loop). Activating this
mode will save you some extra computer power, if needed.
Connections
On the back panel of Dr.Rex you will find the connectors, which are mostly CV/Gate
related. Using CV/Gate is described in the chapter “Routing Audio and CV”.
Audio Outputs
These are the main left and right audio outputs. When you create a new Dr.Rex de-
vice, these are auto-routed to the first available channel on the audio mixer.
Slice Gate Output
This outputs a gate signal for each triggered slice in the loop.
Modulation Inputs
These control voltage (CV) inputs (with associated voltage trim pots), allow you to
modulate various Dr.Rex parameters from other devices (or from the modulation out-
puts of the Dr.Rex device itself). The following CV inputs are available:
• Osc Pitch.
• Filter Cutoff.
• Filter Resonance.
• Amp Level.
• Mod Wheel.
Modulation Outputs
The Modulation outputs can be used to voltage control other devices, or other param-
eters in the Dr.Rex device itself. The Modulation Outputs are:
• Filter Envelope.
• LFO.
Gate Inputs
These inputs can receive a CV/gate signal to trigger the two envelopes. Note that
connecting to these inputs will override the “normal” triggering of the envelopes. For
example, if you connected an LFO CV output on another device to the Gate Amp in-
put on the Dr.Rex, the amplitude envelope would not be triggered by the incoming
MIDI notes to the Dr.Rex device, but by the LFO CV signal. In addition you would only
hear the LFO triggering the envelope for the slices that were playing at the moment of
the trigger.
• Amp Envelope
• Filter Envelope