Dave Smith Instruments TETRA User Manual

Page 16

Combos

When in Program Mode, press the Mode switch to enter Combo Mode. Combos
are combinations of four programs, one for each voice. In Combo Mode, use
S

ELECT

and increment/decrement to change combos. Each of the A

SSIGNABLE

ARAMETERS

knobs controls a parameter for its respective voice: knob 1 for

voice 1, knob 2 for voice 2, and so on. And the bottom row of knobs affects all
voices and programs in the combo. For more about combos, see Combos on
page 33.

Saving a Program or Combo

To save a program or combo, press W

RITE

. To store in a different location, use

ELECT

to choose the target destination, and hold the increment or decrement

switch to choose a different bank (programs only; there is only one bank of
combos). Press increment (+) to complete the write operation or decrement (-) to
cancel (or press W

RITE

again).

Voice Architecture and Feedback

As you can see from the illustration on the following page, the left Audio Output
goes through a programmable-gain pre-amp (controlled by the Feedback Gain
parameter), then through a VCA for feedback volume control, and then to the
filter input. Turning up the Feedback Volume will cause varying amounts of the
audio output to be mixed back in pre-filter, individually per voice. For most
purposes, small amounts of feedback are most useful and the resulting effect is
similar to an overdrive distortion. Higher levels of feedback can get very
squirrelly and rude (which may be exactly the effect you’re looking for).

EEDBACK

AIN

also affects the level of the feedback signal, so you’ll typically

want to start with F

EEDBACK

AIN

turned down.

Several of the factory programs already have some level of feedback
programmed in, as often indicated by the letters “FB” following the name. To
hear the effect of Feedback Volume and Feedback Gain, call up one of those
programs and vary those parameters.

Further Reading

For information about using Tetra multitimbrally, see “Multi Mode” and “Audio
Out” in Global Parameters on page 13.

For information about using Tetra as a voice expander with a Prophet ’08 or
another Tetra, or using Mopho as an additional voice for Tetra, see Using Poly
Chain on page 36.