MIDI
General
The MIDI interface is a so-called MIDI to CV & Gate/Trigger that converts MIDI messages to
analog control voltages (CV) and Gate/Trigger (Gate/Trigg) control voltages. There are six CV
channels, CV1-CV6, and two Gate/Trigg ports, Gate1/Trigg1 and Gate2/Trigg2.
All the functions that have an external ’Control Voltage Input’, normally marked ’CV’ can be
controlled via MIDI control voltages CV1-CV4.
The MIDI interface is preconfigured for certain functions, see description below, but can be re-
configurated by first programming the MIDI message that is to control the CV output and then
routing the CV output to the module to be controlled.
For example, CV2 can be configured to be controlled by a foot controller instead of Note-On
Velocity which is the factory-preset configuration. Or CV4 can be programmed to accentuate a
filter at a certain keystroke, so-called accent function instead of the preset configuration which
is Channel After Touch. See
CV Gate/Trigg Configuration
below.
MIDI channels are selected by the MIDI CHANNEL switch on the Rear Panel. This switch sets
the address in binary form.
MIDI channel 1; all pins down (0000).
I
I
MIDI channel 16; all pins up (1111).
26
MIDI channel switch, code pattern
Startup
After startup of the instrument all CV outputs are at 0 Volt and Gate/Trigg outputs are actively low
(0Volt). MIDI mode is Mono On, Omni off.
CV1 and Gate1/Trigg1
Function
CV1 is used to control the Main Tune and is permanently programmed for MIDI Note On/Off
messages. When a Note-On message is received a corresponding control voltage is sent to
the CV1 output, Gate 1 goes actively high and Trigg 1 generates a short pulse. When a
corresponding Note-Off message is received, Gate 1 goes actively low and CV1 retains its
value.
CV1 is preprogrammed to produce 0 Volt out with MIDI note number 24. The tone it produces
is selected by, among other things, transposing the Master Controller’s selector and the
oscillator Range switch (see description of oscillators for more detail). The notes with
numbers lower than 24 are ignored by default but can be reprogrammed to provide a total
register of 10 octaves.
If several Note-On messages are received in sequence the most recently received note is
played. For each Note-On message a new Trigg 1 pulse is generated if it is not inhibited by the
Legato mode. When a Note-Off message is received the previous note is sent out and a new
Trigg 1 pulse is generated. Five simultaneous Note-On messages can be stored in the
memory.
CV1 controls, via MASTER CONTROLLER selector switches on the front panel, the frequency
of the oscillators (switches OSC1, OSC2, OSC3) and the frequency corners of the filters (LPF
TUNE and MMF).
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General