Eclipse User Manual
the parameters in the Eclipse to ignore the tempo, set SETUP TEMPO (TAP
SRC) to Off.
Now that you have that straight, lets continue. The Eclipse can calculate
delay times in terms of the tempo, as described above, or it can calculate
them as the absolute time between two taps of the TAP key (useful for live
situations). Select PARAMETER page 2 <EDIT MOD> TTIME (MODE) to
select between systemtempo and longdelaytap. With (MODE) set to
systemtempo, everything behaves as we?ve described so far.
On the other hand, with (MODE) set to longdelaytap, every ?T_DELAY?
and ?T_LOOP? parameter derives its delay time from the interval between
successive taps of the TAP key.
With (TTYPE) set to update, the first of two taps marks the beginning of
an interval, and the second tap defines the end of the interval. You can
watch the interval grow between the taps at (RUN) and check out the re-
sulting delay time at (DELAY). A third tap starts the interval over at 0 and a
fourth tap defines the end of the new interval.
With (TTYPE) set to climb, the first of two taps begins increasing the ex-
isting interval from the point that it left off, and the second tap defines the
end of the interval. Again, you can watch the interval grow between the
taps at (RUN) and check out the resulting delay time at (DELAY).
To reset the interval with (TTYPE) climb, select an external modulator
such as pedal 1 under EXT_RESE. Turn to page 44 for details on setting
up external controllers.
Envelope-following Parameters: SENS, ATTACK, and DECAY
Many algorithms involve parameter modulation via an ?envelope follower.? An envelope follower tracks the
level of the input audio and modulates some parameter according to that level. Envelope filters are a prime
example of this sort of modulation: the envelope follower modulates the cutoff frequency of a resonant fil-
ter. In the Eclipse, envelope followers frequently modulate LFO rates, so that as the input signal gets louder,
the LFO rate speeds up.
(SENS) adjusts the sensitivity of the envelope follower. Use lower values
for quieter input levels and higher values for louder input levels. Short
values of (ATTACK) and (DECAY) track the envelope tightly, while longer
values smooth out the response.
LFO Parameters
LFOs (low-frequency oscillators) abound! An LFO produces a slowly al-
ternating signal that modulates some parameter or another. (RATE) and
(T_RATE) determine how fast the signal oscillates. (FMRATE) and
(T_FMRATE) determine to what degree the speed of oscillation is affected
by the envelope follower (i.e., the loudness of the input audio). (SHAPE) determines the shape of the alter-
nating signal. For shapes such as triangle and square the (DUTY) parameter ?shifts? their shape. Via
(DUTY), triangle waves can vary between sawtooth and ramp-shaped, and square waves can change
their pulse length relative to the (RATE).
If the (RATE) is changed either ?manually? or via a tempo update, an LFO will (of course) alter its rate. The
old rate is crossfaded to the new rate. The length of the crossfade is determined by (RETRIG) as a percent-
Eclipse User Manual Page 36 of 64 Release 3.000 |
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