4ms EnvVCA Руководство пользователя - Страница 9
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Patch: Ratcheting
Cycle on
Switches and sliders
set to taste
Rise/Fall CV turned to
the left. Controls speed
of ratcheted
envelopes.
From sound source
(e.g. a VCO)
Optional: To VCO
modulation input
To mixer/output
amp
Self-Patched Ratcheting
In this patch we'll make a ratcheting effect where the notes play at a steady tempo for a while, and then
periodically speed up in a rapid burst. Start with the Making Notes patch on Channel A, with Cycle on
and the Audio In/Out jacks patched to a sound source and mixer. With the Time CV knobs centered,
you should be hearing notes at a steady tempo.
Turn on Cycle for Channel B. Adjust the Rise and Fall sliders of Channel B so that it's going at least
four times as slowly as Channel A. Patch the EOF output of Channel B to the Time CV input of
Channel A. Turn Channel A's Rise CV and Fall CV attenuverters slightly to the left, so that when the the
EOF jack fires a pulse, the notes play at a faster rate.
Adjusting the Rise time of Channel B will change the pulse width of the EOF pulse, thus controlling the
duration of the rapid bursts. The sum of the Rise and Fall times on Channel B controls how often the
ratcheting occurs. Try adjusting these parameters slightly to hear the effect it has on Channel A.
Ratcheting With a Clock Divider
With the previous patch, it's hard to specify the exact relationship between the base tempo of Channel
A and Channel B. Using a clock divider module such as the RCD or QCD can give us more control.
Unpatch the cable from EOF to Time CV. Turn off Channel A's Cycle and patch the clock divider's
undivided output to Channel A's Trigger jack. Adjust the speed of the clock divider to set the base
tempo. Next, patch a divided output from the clock divider (say, /8) to the Cycle jack and Channel A's
Time CV jack. Adjusting the pulse width of the divided clock controls the duration of the rapid bursts.
Adjusting the amount of clock division controls how often the bursts happen.
Slow
Cycle
Med
Fast
Rise
Fall
Slow
Level
ENV
OUT
Fast
A
Rise
Fall
Offset
Time CV
Rise
Fall
Trigger
EOR
Follow
In
Out
A
OR
VCA CV
Env
Out
Audio A
Dual EnvVCA
Page
9
Slow
Med
Fast
Rise
Fall
Slow
Level
Fast
B
Rise
Fall
Offset
Time CV
Rise
Fall
Trigger
EOF
Follow
A
In
Out
B
VCA CV
Audio B
of
20
Cycle on
Switches and
sliders set to
taste. Rise time
sets how long
ratcheting lasts.
Rise plus Fall
sets how often
ratcheting
occurs.