Dave Smith Instruments TETRA - Manual (Page 23)

17
Program Parameters
All Program parameters can be edited using any of A
SSIGNABLE
P
ARAMETERS
controls. To assign a parameter to a control, press the A
SSIGN
P
ARAMETERS
button to light the LED, and then turn any of the knobs (1 through 4) to select a
parameter. A full list of the parameters can be found on page 44. The selected
parameter and value appear in the LCD display. The top line of the LCD
displays the programmed value for reference; the bottom line displays the edited
value.
To then change the value of the parameter you selected, hit the A
SSIGN
P
ARAMETERS
button again, and the same knob will now change the value. You
can also use the increment and decrement switches to adjust parameter values.
Note: Once you are done editing a program, before you save it, you
should consider what parameters you want to access when playing the
new program. Generally, when making a program, we try to assign each
of the 4 knobs to a different parameter that makes sense for that
particular program, providing extra live control.
Though it is certainly possible to perform detailed program generation and
editing using these controls, it is usually much faster to use the free editor
available for Mac OS or Windows. The minimal front panel of the Tetra is
designed for fast, real-time changes in live performance.
Following are descriptions of each Tetra Program parameter.
Oscillator Parameters
Tetra has two analog oscillators per voice. The basic controls for each oscillator
are the same.
Note: There are additional modulation controls that can affect the pitch
of Oscillators 1 and 2. These are covered in other sections of the
Parameter definitions.
Osc Freq: C 0…C 10 — Sets the base oscillator frequency over a 10 octave
range, from 8 Hz to 8KHz, stepping in semitones. C3 is middle C, the first
octave is 0 (C0, C#0, etc.), the second octave is 1 (C1, C#1, etc.), and so on.
Fine Freq: -50…+50 — Fine Tune control; 0 centered. Steps in cents (50 cents =
1/2 semitone).
Shape: see table — Selects the oscillator waveshape as follows: