Midi Applications; What Is Midi; How And What To Connect - Johannus Opus 5 User Manual

MIDI applications

What is MIDI?

MIDI is the abbreviation of Musical Instruments Digital Interface. With MIDI different musical
instruments can be connected with each other or a computer. For example, it is possible to play
on your organ and at the same time on a synthesizer or an expander module. The MIDI
standard is partly based on hardware. Next to that it is a worldwide agreement about the way
music and sound are being interpreted and communicated between devices that have MIDI
capability. The MIDI codes sent by a Johannus organ tell e.g. which key is played.
MIDI consists of the following parts:
! MIDI-connections (MIDI IN, MIDI MOD., MIDI SEQ.).
! MIDI-stops
! A device (e.g. synthesizer) that you want to connect through MIDI
! Connection cables
The MIDI-stops are the last in the group of stops of the Pedal, Great, Swell and Choir (only for
Opus 30).
The MIDI stops have a number. The MIDI number for Great on the OPUS 5, 10 and 20 is
number 1 (for Opus 30 the MIDI Great is number 2). This number indicates the MIDI channel
used to transfer key information through MIDI SEQ. when playing the Great. MIDI has at least
16 channel to transfer data. The MIDI stops determine from which keyboard(s) you send key
information to other device(s).

How and what to connect?

Imagine you want to connect 3 expanders to your organ. One you want to play from the Great,
the other from the Swell and the third from the Pedal.
The following has to be done:
1. Connect the expanders with the MIDI cables (DIN).
2. Switch on MIDI stop Great 1. The expander must be configured so that it can only receive
data through the channel programmed to MIDI stop Great 1 (see under "Programmable
MIDI").
3. Switch on MIDI Swell 2. Set the second expander for the channel programmed to MIDI stop
Swell 2.
4. Switch on MIDI stop Pedal 3. Set the third expander for the channel programmed to MIDI
stop Pedal 3.
User's Manual
JOHANNUS JOHANNUS
20
Opus 5, 10, 20 and 30 AGO