Doepfer A-155 Analog/Trigger Sequencer - Manual (Page 9)

doepfer System A - 100
Analog / Trigger Sequencer
A-155
9
Trigger row 1 (steps 1, 2, 3 and 5 selected) picks out
the accented notes, by triggering an ADSR, which
controls the VCA.
Trigger row 2 determines the length of the se-
quence, by triggering the reset function. In this
example, step seven is switched to this row, which is
patched to the reset input, making the sequence six
notes long.
The gate row is used for controlling the glide func-
tion. In this example, step two is switched to this row,
so that portamento (at a rate set by the Glide control)
occurs between the voltages at step one and step two.
The lower analog CV row is controlling the VCF
cut-off frequency.
Trigger row 3 is available for any other control job you
choose. Variations on the patch in fig. 3 might include
controlling the VCF with either the same or a different
ADSR, or using the lower analog CV row to control the
decay time of a VC-ADSR (see also fig. 4).
Interesting effects can be obtained by patching exter-
nal control voltages (e.g. from an LFO or Random
CV) or audio signals (e.g. VCO or Noise) into the
lower analog CV row. The latter can sound particu-
larly interesting, because of the effects of short bursts
of audio-range frequency modulation.
Interesting effects can be obtained by patching exter-
nal control voltages (e.g. from an LFO or Random
CV) or audio signals (e.g. VCO or Noise) into the
lower analog CV row. The latter can sound particu-
larly interesting, because of the effects of short bursts
of audio-range frequency modulation.