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:
You can change the pitch of a REX file in three ways:
This is done using the Oct knob. The range is 0 - 8, with "4" the default.
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 (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.