26
The Modulation Matrix
The heart of a versatile synthesiser lies in the ability to interconnect the various controllers,
sound generators and processing blocks such that one block is controlling – or
“modulating” - another, in as many ways as possible. Peak provides considerable flexibility
of control routing, and there is a dedicated menu for this, the Mod Menu. The available
modulating sources and destinations to be modulated can be thought of as the inputs and
outputs of a large matrix:
The example here shows how any two sources, in this case Velocity and LFO 2, can
simultaneously modulate the same parameter, in this case Osc 2 Shape. Many mod matrix
assignments will only use a single source. Note that the two modulation sources are
effectively multiplied together, and that the Depth parameter controls the overall degree of
modulation. The diagram depicts a single matrix “slot”; Peak has 16 such slots, allowing an
enormous range of modulation possibilities.
Press the Mod button
56
to open the Modulation Menu, which comprises 16 pages,
one for each slot. The page lets you define which (one or two) modulation sources are
to control – i.e., modulate - a ‘destination’ parameter. The routing possibilities available
in each slot are identical, and hence the control description below is applicable to all 16
pages.
The default menu display for Slot 1 is shown below:
:sA [Slot 1] sB:
Destin O123Ptch
:HDirect : Direct
Depth +0
Osc1Ptch
Osc2Ptch
Osc3Ptch
O123Ptch
Osc1VSnc
Osc2VSnc
Osc3VSnc
Osc1Shpe
Osc2Shpe
Osc3Shpe
Osc1 Lev
Osc2 Lev
Osc3 Lev
NoiseLev
Ring Lev
VcaLevel
Filt Drv
FiltDist
FiltFreq
Filt Res
Lfo1Rate
Lfo2Rate
AmpEnv A
AmpEnv D
AmpEnv R
ModEnv1A
ModEnv1D
ModEnv1R
ModEnv2A
ModEnv2D
ModEnv2R
FM O1>O2
FM O2>O3
FM O3>O1
O3>FiltF
Ns>FiltF
MOD DESTINATIONS
ModWheel
Direct
AftTouch
ExprPED1
BrthPED2
Velocity
Keyboard
Lfo1+
Lfo1+/-
Lfo2+
Lfo2+/-
AmpEnv
ModEnv1
ModEnv2
Animate1
Animate2
CV +/-
MOD SOURCES
Lfo3+
Lfo3+/-
Lfo4+
Lfo4+/-
BndWhl+
BndWhl-
Velocity
Lfo2+
Osc2Shpe
Velocity
Lfo2+
Osc2Shpe
Slot 16
Slot1
Velocity
Lfo2+/-
Osc2Shpe
Depth
The Modulation Matrix is both variable and additive. What do we mean by
a ‘variable’ and ‘additive’ matrix?
By ‘variable’, we mean that it is not just the routing of a controlling source to a controlled
parameter which is defined in each slot, but also the “magnitude” of the control. Thus
the ‘amount’ of control – or Depth – used is up to you.
By ‘additive’ we mean that a parameter may be varied by more than one source, if
wished. Each slot allows for two sources to be routed to a parameter, and their effects
are multiplied together. This means that if either of them is at zero, there will be no
modulation. However, there is no reason why you can’t have further slots routing these
or other sources to the same parameter. In this case, the control signals from different
slots “add” to produce the overall effect.
Mod Wheel Position
SOURCE 1: LFO
SOURCE 2: MOD WHEEL
SOURCE 1: LFO
MOD SLOT NO 1
MOD SLOT NO 1
MOD SLOT NO 1
MOD SLOT NO 1
MOD SLOT NO 2
MOD SLOT NO 2
SOURCE 2: MOD WHEEL
SOURCE 1: MOD WHEEL
SOURCE 2:
SOURCE 1: LFO
SOURCE 2:
SOURCE 1: MOD WHEEL
SOURCE 2:
SOURCE 1: LFO
SOURCE 2:
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