Viscount Legend '70s Artist, Руководство пользователя

Страница: 139 / 146

MIDI
- 1
MIDI Informations
MIDI INFORMATIONS
What is MIDI
The MIDI ( M usical I nstrument D igital I nterface) allows instruments of different makes and types to communicate with
each other by means of this clearly specified protocol of codes. This makes it possible to create systems of MIDI
instruments which offer much better versatility and control than can be achieved with separate instruments. To make
this communication possible, all MIDI instruments are equipped with two or three 5 pin DIN connectors marked:
-
MIDI IN : By means of this connector, the device receives the MIDI data emitted by other units.
- MIDI OUT : By means of this connector, the device sends the MIDI data it has generated to other units.
- MIDI THRU : This connector, used to connect several units in series, emits the MIDI data exactly as they
are received by the respective MIDI IN port.
N.B.:
Legend ‘70s is not equipped with the MIDI THRU connector.
However, a Thru software function is available.
For example, most instruments equipped with MIDI interface transmit MIDI messages which specify which note has
been played and with what velocity by means of the MIDI OUT connector. If this connector is connected to the MIDI
IN of another MIDI instrument, such as a synthesiser or an expander, the connected instrument will give a precise
response to the notes played on the transmitter instrument. This allows you actually to play two instruments at the
same time, and obtain special multi-instrument sounds. The same type of transfer of information is used to record
MIDI sequences. A sequencer can be used to record the MIDI data transmitted by the
Legend ‘70s
. When these
recorded data are sent to the
Legend ‘70s
, it will automatically play back the recorded performance.
MIDI Channels
The MIDI is able to transmit a multitude of digital data by means of a single cable and thus a single connector,
thanks to the MIDI channels. There are 16 MIDI channels, so MIDI messages are processed when the channels
of the receiver and transmitter instruments are the same.
Legend ‘70s
transmits and receives MIDI data in the
channel setted with the Global Channel parameter in the SYSTEM / MIDI SETTINGS section.
Main MIDI messages transmitted and received by the Legend
‘70s
CHANNEL MESSAGES
NOTE ON
This message is transmitted when a keyboard note is pressed. Each Note On contains the following data:
Note On : when the key has been pressed;
Note Number : which key and therefore note has been pressed;
Velocity : dynamic, that is, the quantity of pressure on the key.
Note numbers vary between 0 and 127; the central C corresponds to number 60.
Data format: 9nH kkH vvH
n=channel number:
00H – 0FH (1 – 16)
kk=note number: 00H – 7FH (0 – 127)
vv=note on velocity: 01H – 7FH (1 – 127)
00H (0) Note Off
NOTE OFF
This message is transmitted when a key is released. When the message is received, the corresponding sound
stops. A Note Off message contains the following data:
Note Off : a key has been released;
Note Number : which key has been released;
Velocity : dynamic, that is, energy of the release.
Data format: 8nH kkH vvH
9nH kkH 00H
n=channel number:
00H - 0FH (1 – 16)
kk=note number: 00H – 7FH (0 – 127)
vv=note off velocity: 00H – 7FH (0 – 127)
NB:
if a Note On message has Velocity=0, it counts as a Note Off message.