Types Of Midi Information; Matching Midi Channels - Yamaha PortaSound PSS-795 Owner's Manual

Additionally, If you make a couple of MIDI OUT-to-MIDI IN
connection as shown below, you can use either of the
instruments for Master and Slave at the same time.
MIDI OUT
PSS-795
MIDI IN MIDI OUT MIDI IN
A 8612 MIDI Instrument (А)
goo
(Master/Slave) (Master/Slave)
When you connect more than three MIDI instruments, you
use the MIDI THRU Terminal as shown below. This
illustration shows that the PSS-795 can have two "Slaves"
ffPultaneously. In this case, MIDI instrument (A) cannot
nd MIDI musical instrument (B), because the MIDI
THRU Terminal only Transmits the command, which came
in via the MIDI IN Terminal, to MIDI instrument (B).
COMMAND: Play - Do re mi. COMMAND: Play - Do re mi.
MIDI OUT MIDI IN MIDI THRU MIDI I
Fas pa PHP
COM n С) MIDI Instrument MIDI Instrument
i
wer
(A)
(B)
95
Do re mi Pd Do re m
When connecting using MIDI THRU Terminals, you may have no more
than 3 or 4 Slaves at a time. For every time MIDI data pass the MIDI
THRU Terminal on each MIDI device, the data will be delayed and
even lowered. This may result in a wrong MIDI performance. So, when
m wish to have much more Slaves, use a MIDI THRU BOX which
stributes the same MIDI data to multiple Slaves simultaneously.
*
PSS-795
ap iniu
M dL nr Age,
PO ALAALA
MIDI OUT
MIDI THRU BOX
MIDI OUT MIDI IN
MIDI IN;
MIDI Instru- MIDI Instru- MIDI Instru- MIDI Instru-
ment (A) ment (B) ment (C) ment (D)
Owner's Manual
d. Types of MIDI Information
MIDI Information includes various kinds of messages
(commands). You should learn some basic ones among
them, which all are transmitted or received on the
PortaSound.
Even when you press a key with one finger, information like
Note number (which key), Note on/off (when pressed/
released), and Velocity (how fastly and strongly played) will
be transmitted. Not only these, but Program Change (for
Voice selection) and Control Change (for Voice Effects)
can also be Transmitted. These kinds of information are
called "Channel Messages". In order for these types of
information to be communicated, you must select the same
MIDI Channel number (from 1 to 16) on both the
Transmitter (Master) and Receivers (Slaves) among the
MIDI-connected instruments. There is another kind of
information called "System Messages", which you need
when you have a rhythm machine or sequencer
synchronized to play together.
Any MIDI information is rapidly transmitted/received in
digital signals comprised of just two numerals 0 and 1.
e. Matching MIDI Channels
MIDI instruments/devices can transmit or receive
information only when you select the same MIDI Channel
on both Transmitter and Receiver, this is a basic rule to
remember. For example consider how T.V. channels work;
when you want to see a movie, you must select a certain
Channel which is broadcasting the movie. In basically the
same way, one MIDI cable can carry different kinds of MIDI
performance information on 16 MIDI Channels. When the
Receiver is set to the same MIDI Channel of the information
as on the Transmitter, you can have it play as the received
information. The following example shows a sequencer
transmitting MIDI performance information for several parts
on corresponding MIDI Channels. Each Receiver's MIDI
Channel has been prepared so as to receive the specified
performance information and independently plays out with a
different sound and melody.
Ch. 1 Sax Part
Sequencer Ch. 2 Piano Part
Ch. 3 Bass Part
Ch. 4 Rhythm Part
MIDI THRU
MID! instru-
RE UB IE RE
Sax Sound Piano Sound Bass Sound Rhythm Sound
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