Manual General Music CD30 (page 24 of 36) (English)

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What is Midi?

Midi is a system for communicating between electronic in-

struments. With Midi it is possible to:

- use the CD20/30 keyboard to control another musical in-

strument;

- use another device (keyboard, sequencer, computer) to

control the Sounds and Styles on the CD20/30;

- connect the CD20/30 to a sequencer or a computer (this

covers both the previous cases), for programming the

Songs or Styles externally.

Midi Connections

The fundamental rules of Midi connections:

- In technical jargon, an instrument which controls another

instrument is called master, while the instrument which is

being controlled is called the slave.

- Connect the MIDI OUT on the master instrument to the

MIDI IN on the slave instrument using a standard Midi

lead.

- To program Songs on an external sequencer or compu-

ter, connect the MIDI OUT on the CD20/30 to to MIDI IN

on the sequencer/computer; the MIDI OUT on the

sequencer/computer to the MIDI IN on the CD20/30.

- Never connect two Midi ports on the same instrument

together.

The MIDI THRU port

The MIDI THRU port allows a series of musical slave instru-

ments to be “chained” together:

master

slave slave OUT IN INTHRU

In the example, “slave 1” and “slave 2” are controlled by the

“master”. “Slave 2” is not receiving data from “slave 1”, which

is only acting as a bridge.

The MIDI mode structure

MIDI mode programming is divided into sections; some sec-

tions are subdivided into pages.

To pass from one section to another or from one page to

another use the [PAGE] key. To call up a page of a section

press the [MIDI] key while the name of the section is dis-

played. To exit from the page and return to the previous sec-

tion press the [ESC] key.

Here is a list of the sections:

Sections Structure and contents

Channel selection Pages. Assigns Midi channels to

the instrument parts and to the

Common Channel.

MIDI:Clock Selects Midi Clock syncronization

(Internal/External).

Local On/Off Pages. Programs Local Off

(disactivates the individual parts’

sound generators).

MIDI: Filters Pages for Input and Output filters.

Programs the Midi filters (to ex-

clude certain Midi communication

messages).

MIDI: Dump Archives the contents of an exter-

nal sequencer’s memory.

MIDI: Dynamic Keyboard Activates/disactivates keyboard

dynamics.

MIDI: GeneralMidi On/Off Activates/disactivates General

Midi compatibility.

MIDI: Slave Keyb-Tracks Determines the instrument’s

multitimbral Midi status (two or six

parts).

MIDI: Slave Keyb-Start/Stop Activates/disactivates the re-

sponse of the CD20/30 to the Midi

Start/Stop message.

EXTRA FUNCT -BassFollow (Dealt with in the chapter on Style

use).

EXTRA FUNCT- Autostop (Dealt with in the chapter on Style

use).

How to exit from MIDI mode

To exit from [MIDI] prese the [ESC] keys.

Instrument parts and Midi channels

Each of the six instrument parts of the CD20/30 can be as-

signed to a different Midi channel, to be chosen from the 16

available (1-16). The factory settings are as follows:

Instrument part Midi channel

Drum 10

Bass 2

Acc1 3

Acc2 6

Lower 4

Upper 5

The corresponding parts must be assigned to the same Midi

channels on other Midi units which are connected. Here are

some practical examples, with the CD20/30 set up as in the

table above:

- If the CD20/30 is controlling an expander with only its

Upper part extending throughout the whole keyboard

range, the expander should be set to receive on Midi chan-

nel 5.

- If the CD20/30 is controlling a multitimbral expander, that

is, with more than one instrument part, then the instru-

ment parts of the expander should be assigned to the same

channels as the CD20/30: the Drum part to channel 10,

the Bass to channel 2, and so on...

- If the CD20/30 is being controlled by another instrument

(master), then the parts on the master must be set to the

CD20/30 channels, or alternatively, set the CD20/30 parts

to those of the master.

MIDI

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General Music CD30 Manual

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