Oberheim Matrix-12 - Ramp X; Retrig Mode; Stopping an Envelope

The effect of LFO LAG is especially prominent when used to reshape the
SQUAREwave because it has two instantaneous transitions - a 90* rising edge
and a corresponding 90* falling edge. The diagram on the previous page shows a
"before" and "after11 effect of LAGon a Square wave. The sharp falling edge of
UP SAW and the rising edge of DOWN SAWare affected by LAG as well.
RETRIG MODE The LFOs, like the Envelopes and Ramps, can be
triggered by the Keyboard or by an External source. As we
mentioned in Page 1 parameter RETRIG, we are able to
select the mode of triggering in this Parameter.
OFF
This indicates that the LFO is not triggered and will cycle
freely.
SINGLE "Single Trigger"
As with Ramps and Envelopes, the LFO will retriggeronly if
the Voice is not already playing. A Staccato style of playing
will retriggerthe LFO and Legato will not.
MULTI "Multiple Trigger"
The LFO will retrigger regardless of the playing style.
EXTRIG "External Single Trigger"
The LFO will retrigger only when a trigger pulse is received
from an external source plugged into the TRIGGER IN jack.
Stopping an Envelope
Pressing the TUNE PAGE button will cut short any envelopes in progress. This is
also called the Envelopes' "Manual Reset".
RAMP X The four Ramp Generators in the MATRIX-12 produce a type of modulation that
can be best described as a smooth, linear transition that resembles the Attack
portion of an Envelope. Ramps operate much the same as the Envelopes in that
they require a trigger to work. When a Ramp gets a trigger (that "go" signal we
mentioned before in the ENV X chapter) from the Keyboard, one of the LFOs or
externally from the TRIGGER IN input, it begins its cycle and waits for another
trigger to start again.
Using the RAMPS
The operation of a Ramp is simple. When used as a modulation source, the Ramp
starts is cycle when it receives a trigger. It then begins to generate an increasing
control signal gradually until it reaches its maximum. The time that it takes to do
this is set by the RATE parameter.
One of the most common uses of the Ramp is for Vibrato delay. If an LFO is being
used for vibrato, a Ramp can be used to gradually bring it in. This is accomplished
by using the Ramp as the Modulation Source, assigning it to the AMPoi an LFO.
Or, if used with a negative Amount value (inverted), the Ramp can take the LFO at
its programmed^amount and gradually fade it out. So, anytime you need a simple
increase or decrease of a modulation amount or speed etc., use a Ramp.
Matrix-12 Owner's Manual 137