Audio Damage Sequencer 1 - Manual (Page 23)

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modules is predictable and repeatable. However, once started, the LFOs can cycle
independently of the pattern. For instance, if the pattern is 16 steps long and an LFO’s Length
setting is 64, the pattern will play four times before the LFO completes one cycle. Conversely, if
the pattern’s length is 64 and the LFO’s is 16, the LFO will complete four cycles while the
pattern plays once. This can become more interesting if the pattern length and LFO length
aren’t simple multiples of each other. If the pattern is 16 steps long and the LFO’s length is 15,
for example, the LFO will move out of phase with the pattern as the pattern plays, eventually
lining up again with the beginning of the pattern. Consider also that each LFO can have a
different length, and hence can drift in and out of phase with the pattern (and with the two other
LFOs) in its own way.
7.3.2. LFOs As Simple Envelope Generators
The LFOs are very tightly synchronized to the sequencer. LFOs start exactly in sync with steps.
This means that you can use a LFO with a length of 1 as a simple envelope generator. The
Ramp Down and Curve Down shapes work particularly well for this. Set a CV’s Output Mode to
LFO and presto, you’ve got a simple decay envelope which can drive a VCA or a filter’s
frequency input directly. If you use one of the half-cycle shapes (designated by a
½ at the
beginning of their names) and set the LFO’s length to 2, you’ll get an envelope which fires on
every other step.
Now, suppose you want that envelope to fire only on certain steps. This is where the LFOx
(multiply) CV Output Mode comes into play. This mode multiplies the LFO’s level by the CV level
set in each step. If the step’s CV level is zero, the CV output will be zero (since zero times
anything is zero). If the step’s CV level is, say, +4.0V, and you’re using the Ramp Down LFO
shape and a LFO Length of 1, you’ll get an output voltage that sweeps from +4V to 0V for that
step. This means that you can program different peak values for the sweep for each step in the
sequence—including zero values and negative values. You can also scale the peak values all at
once by adjusting the LFO’s Amplitude parameter.
7.3.3. Creating Accents
Imagine you’re using one of the CV outputs to control a filter’s frequency by entering different
values for each step’s CV parameter. Now suppose you’d like to add an accent to every eighth
step by opening the filter more. You could use the ACC output, or you could enter new CV
values for the appropriate steps. You could also use the LFO. Set the LFO’s Shape to Rect 1/8
and its Length to 8. Then set the pattern’s CV Output Mode to LFO+. This will add a rectangular
pulse to the CV output on every eighth step, starting with the first step. If you change the LFO’s
Phase parameter, you’ll change the steps, relative to the beginning of the pattern, which the
accents fall on. If you change the Shape to Rect 2/8, you’ll get the accent on pairs of steps:
every eight step and each immediately following step. Finally, change the LFO’s Amplitude
parameter to change the height of the pulse.