Follow Jack
The
Follow
jack is the input of a slew limiter, and can also be used for
complex envelope generation, exotic audio filtering, envelope following and
sidechaining.
Whenever the internal envelope is not triggered or cycling, the envelope
output will rise or fall in order to match the voltage level present on the
Follow
jack. However, the rate of rise and fall times is limited by the positions
of the
Rise
/
Fall
sliders and the CV amounts. That is, the envelope output will
try to “follow” the signal present on the
Follow
jack, but it can only rise and
fall as fast as the envelope would rise/fall if it were to be triggered. Since
“slew” is the rate of change, we call this “slew limiting”.
The
Follow
jack can be used for envelope following, sidechaining,
waveshaping, audio filtering, portamento and more. See Fundamentals of the
Follow Jack on page 17 for more information.
EOR and EOF Output Jacks
The
EOR
(End of Rise)
jack
is specific to Channel A. It outputs a gate that
goes high when the rise stage ends and the fall stage begins. It remains high
as long as the envelope is falling, and goes low when the envelope
completes. When the envelope is not running, the
EOR
jack will stay low. The
EOR
light will shine orange whenever the output is high.
The
EOF
(End of Fall)
jack
is specific to Channel B. It outputs a gate that
goes high when the fall stage ends, and remains high until the envelope
begins rising. Said another way, the gate at the
EOF
jack only goes low
during the rise stage. The
EOF
light will shine orange when the
EOF
output is
high.
Rise and Fall Time Ranges
Note that the switch positions have little effect on the range obtained by using CV. This is intentional, to
allow external modules control over the full range.
Because of its analog nature, the maximum and minimum rise and fall times vary from unit to unit. The
table above shows typical values.
The rise and fall times will not necessarily be equal when the sliders are in the same position. For
precisely equal rise and fall times, manual adjustment is usually needed.
Page of
6
24
Follow
Switch Position
Slider
Range
(total env.
time)
Max Range
with CV
(total env.
time)
Use Cases
Slow
2 min. to
~2Hz
~30-60 min.
to 2.5kHz
Gradual, slow fades or modulation changes
occurring over the course of a long time.
Med
~10
sec. to
~30Hz
Generally suited for typical musical tempos. Useful
for making notes, from snappy percussive sounds to
long decays. The slower slider settings approach
LFO ranges.
Fast
~2Hz to
~500Hz
Good for using as an audio oscillator, or for FM, AM
or other audio-rate modulation. Snappy attacks and
sharp decays.
Fast
Med
Slow
Fast
Med
Slow
Fast
Med
Slow
EOR
EOF
