Modifiers - Orthogonal Devices ER-102 User Manual

Modifiers

The modifiers of a group dictate how the 3 channels of CV/gate modulation (X, Y,
and Z) affect the steps within the group. The SLOPE modifier holds the gain matrix
that routes the 3 CV inputs to each parameter of each step in a group. The HIGH and
LOW modifiers are non-destructive transforms which are activated according to the
logic state of the 3 gate inputs (X, Y, and Z).
The Slope Matrix
This is one of those things that is actually very easy to understand when you are
using it but requires a lot of words to explain.
Each group has 3 slopes (X, Y, and Z) for each of the 4 step parameters (CV-A, CV-B,
DURATION, and GATE). The voltages present at each channel of the modulation bus
are multiplied by each group's slope matrix and then added to each step parameter:
P = P
after before
where,
P : step parameter after modification
after
P : step parameter before modification
before
K , K , K : The 3 slopes (or gains) associated with a given group
X Y Z
V , V , V : the voltages from the 3 modulation channels
X Y Z
In the case of CV-A and CV-B, this adjustment is added after the voltage table lookup
(i.e. after converting the CV index to an actual voltage). To access the slope parame-
ters for a particular modulation channel:
1. Toggle the GROUP MODIFIER HIGH/SLOPE/LOW switch to SLOPE.
1. Toggle the GROUP MODIFIER XYZ switch to the desired channel.
2. Press the GROUP MODIFIER focus button.
Now the GROUP display LED and the GROUP MODIFIER display LED will be lit. This
means that the LEFT knob on the ER-101 will alter the focused group and the RIGHT
knob will alter the slope value associated with the focused step parameter (i.e. CV-A,
CV-B, DURATION and GATE).
Configurable Option: You can configure the voltage that is used when there is no
jack plugged into the CV mod jacks. The default is zero volts.
+ K V + K V + K V
X X Y Y Z Z
CV-A
CV-B
DURATION
GATE
This table shows an example slope matrix that results in the following modifications
to each step parameter:
CV-A = CV-A
after
CV-B = CV-B
after
DURATION = DURATION
after
GATE = GATE
after
This is how the ER-101/102 appears when you are viewing/editing the X column
(1.0, 0.0, 0.0 -4.0) of the example slope matrix shown above. Notice the positions
of the GROUP MODIFIER switches. Since CV-A is focused, the value shown in the
VOLTAGE display is K V = (1.0)V
X X
channel X.
X Y Z
1.0 0.05 0.0
0.0 0.25 0.0
0.0 0.0 0.0
-4.0 0.0 2.5
+ 1.0V + 0.05V
before X Y
+ 0.25V
before Y
before
- 4.0V + 2.5V
before X Z
or just the voltage present at the CV input for
X
14