Dave Smith Instruments TETRA - Manual (Page 37)

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three routed to filter resonance, and sequence four routed to amplifier envelope
amount for accents. Many of the factory programs have sequences programmed,
so you can refer to those to see how certain effects are being achieved.
To program a sequence:
1. Set the Sequencer On/Off parameter to On.
2. Play a note to start the sequence playing.
To avoid having to hold a key down, set the Push It Mode to Toggle.
Then use P
USH
I
T
to start and stop the sequencer. You may also want to
change the Push It Note, the BPM, and the Clock Divide.
3. Choose a destination for the sequence.
4. Set the step values for the corresponding sequence to the desired
values. To quickly edit a sequence, turn A
SSIGN
P
ARAMS
on and use
one of the A
SSIGNABLE
P
ARAMETERS
knobs to choose the sequence
step and the S
ELECT
or increment (+)/decrement (-) buttons to change
the value.
As the sequence loops, you will hear your edits.
5. Follow the same basic steps to program the other sequences.
6. Don’t forget to write your edits to memory! Sequences are saved with
the related program. Just press W
RITE
and then the increment (+)
button to save the program and sequences.
Slew
In modular analog synthesizers, a lag processor or slew limiter is used to create
a time-varying change—a smooth transition—between successive, discrete
control voltage levels. The rate of change is called the slew rate and one
common application is to create a glide (aka portamento) effect between notes.
Among the possible destinations for Tetra sequences two and four is a sequence-
only parameter called Slew. Slew behaves a little differently from the other
modulation destinations, in that it is not really a destination at all; instead, it
affects the sequence above it. That is, if Slew is the chosen destination for
sequence two, it controls sequence one, and Slew in sequence four controls
sequence three.
In Tetra’s sequencer, Slew sets the slew rate between the previous step’s value
and the current step’s value when the step is gated on. Confused yet? This
should help: let’s say sequence one is routed to oscillator frequency and
sequence two to Slew. Increasing the Slew value for step four will cause the