Buchla 200e series, Руководство пользователя

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Euclidian Rhythms
The Euclidean rhythm in music was discovered by Godfried Toussaint in 2004 and is described in
detail in the 2005 paper "The Euclidean Algorithm Generates Traditional Musical Rhythms". The
greatest common divisor of two numbers is used rhythmically giving the number of beats and
silences, generating almost all of the most important World Music rhythms (except Indian additive
rhythms).
To generate pulse patterns using the Euclidian algorithm, select a ring using the “beats/cycl”
encoder, and press the “RHYTHM SELECT” button to select “Euclidian”.
NOTE: this is a
destructive operation , any pulse data in the selected ring will be erased and replaced by the
Euclidian solution rendered in red pulses (however, other pulses can be added, see the Advanced
Editing section below).
To add pulses colors other than red, hold the green or blue buttons while selecting the
pattern#.
Turn the “pattern #” encoder to generate each of the Euclidian pulse patterns for the
number of beats in the selected ring.
The number of pulses in the current solution will be
shown on the segmented display to the left of the encoder.
To exit Euclidian mode, press the “RHYTHM SELECT” button, or turn the “beats/cycl” encoder to
select a different ring. (Note: editing other parameters is not possible while in Euclidian mode, so
to avoid confusion, the 252e automatically reselects the “user-defined” edit mode.)
But the 252e is more than a pulse generator. All these cells can be associated with control
voltages to be used pitches, timbres or, of course, dynamics.
Editing CVs
To associate a CV value with a cell, select the cell using the “cell” and “beats/cycl” encoders as
described in the
Pulses section above. Next press the “select” button in the “CV EDIT”
section until the desired CV output is selected. Turn the encoder below the “select” button to
assign a CV value. A fine tune mode is available by pressing the encoder down; press again to
return to coarse CV edit mode. (Note: Typical Buchla oscillators are based on a1.2v per octave
range, so .1v would equals a half-step.)
Up to six CV outputs (each with different values) can be assigned to any one cell. Remember that
the outputs are shared, so if you assign the same CV output to 2 or more cells that are performed
on different rings by different clocks at the same time, the result will be undefined.
The special “none” CV value, indicated on the segmented display by “- -“ means “don’t change the
output CV”. For example, if you have 4 beat pattern but only want two alternating pitches using
CV output 1, you can assign CV values to cells 1 and 3, and leave cells 2 and 4 with the “none”
value. The output value when cell 1 is performed will remain unchanged by the “none” value in
cell 2, then cell 3 will change the output value, and cell 4 will again leave it unchanged.