Buchla 200e series, Руководство пользователя

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250e Arbitrary Function Generator
The 250e is a 16 stage function generator. Each stage stores two control
voltages, which are set with an array of 16 potentiometers. Time values are
adjusted with a parallel array of smaller potentiometers, and can serve as a
third control voltage. Time can also be synchronized to MIDI clock sent via the
225e. Both control voltages and times can be interpolated, quantized, or
replaced with externally applied voltages for selected stages.
Additionally, there are two programmable pulse outputs, as well as a facility
for voltage control of stage position. Loop counters associated with each
stage can be nested to any level.
EDITING: Data base editing
Voltages and times can always be edited – just turn the knob associated with
each stage to the desired value; to change ranges for either, you must enter
the Edit mode, (depress the Edit switch). Turn the center knob to the desired
stage, chose the desired time range (one of three) and the voltage range (one
of six). Also select the voltage you’d like to operate on (one or two).
Each of the two voltages, as well as the time can be quantized – voltage in .1
volt increments, time in binary rhythmic increments of .01, .02, .04, .08, .16,
.32, .64, 1.28, 2.56, 5.12. Time values may be modified through application of
an external control voltage scaled from 1/2 to 2. Additional fixed scaling over
a range of .25 through 4.0 may be achieved with a dedicated pot. A red
quantize LED alerts you that you’re very close to the edge of a quantize value.
So keep it in the green.
The clock of the 250e can be synchronized to MIDI clock via a 225e. This can
be selected on a stage by stage basis by setting the time range to the fourth
(blank) value. All modes which require an internal clock to count down (ADV,
SUST, ENA) will now wait for an appropriate number of MIDI clock ticks
before proceeding. This clock division is set via the small time knob to one of
seven values:
1) thirty-second note 5) eighth note
2) sixteenth note triplet 6) quarter note triplet
3) sixteenth note 7) quarter note
4) eighth note triplet
If stage 1 is set to use MIDI clock then MIDI start and stop will be obeyed as
well. Upon receiving a MIDI start the sequencer will immediately reset to stage
1 for playback. When using MIDI clock the time mult knob and external
voltage won’t affect the clock division but will affect the interpolation time.