System Messages - KEYTEK CTS 2000 Instruction Manual

It communicates information on the position of the lever or wheel of P.B.; thanks to this information
all the
P.B. variations made on the Master keyboard will also be performed by the Slaves to whom it has
been
sent this type of signal.
After Touch
If your instrument has a keypad that allows you to detect a change in pressure
of the key pressed (After Touch), the Midi system allows you to send all the information related to
this function.
Control Change
Many instruments have controls for functions such as Vibrato On/Off, Portamento, pedal
of Release and other controls relating to particular effects.
The Midi system allows you to send signals for these controls.

SYSTEM MESSAGES

Messages of this type do not concern individual Midi channels but are used to manage the entire
system of instruments connected via Midi.
The system messages include those concerning the start and end of data transmission to the system,
synchronisation signals, tuning signals, signals concerning the number and size of tracks to be played,
etc., and system error messages.
System messages also include so-called 'exclusive system messages'.
The exclusive system messages are those particular messages that each individual manufacturer uses
for particular purposes such as, for example, the possibility of programming a synthesizer via MIDI
through another synthesizer built by the same company.
Each manufacturer of Midi-compatible equipment has its own number or code of the
identification recognisable by their equipment.
This code is used as a prefix when data is to be communicated only and exclusively to instruments of
the same company.
The modes of transmission and reception.
So far we have seen the types of messages or information that instruments or devices can exchange
with each other.
Let us now see the ways in which these messages can be managed.
The Midi system allows you to select three different ways of transmitting and/or receiving
information, namely :
OMNI Mode ON/OFF POLY Mode MONO Mode