Sequential PROPHET-600 - 10-4 PROGRAM SELECT; 10-5 MOD WHEEL

One way to
turn the note
off is
with a Note
On command with velocity
set to
0,
e.g.,
90H-3CH-00H.
Actually, the slave
receiver has a
convenient feature
which allows a
transmitter to
delete unnecessary status bytes.
The transmitter
can leave out the
status byte
whenever the status
doesn't change. So
turning
this note off in this way
really
requires only
two bytes: 3CH-00H.
The
second
way to turn the note off is
with the Note
Off command,
which has a
different
status, and
therefore takes three bytes,
whenever it
follows a Note On
status, e.g,
SOH-3CH-0OH. The Prophet-600
transmitters
always send Note Off
commands
(rather than Note
On/Velocity commands).
(Note Off is not
redundant. It
is
needed to
define the release
velocities of, for
example, the
Prophet-TS.)
As multiple
notes are
turned on, the slave will
assign its voices
just as if the notes
were
coming from its
keyboard. In fact
its keyboard
can
be
played normally. It will
simply play
along with the MIDI
input, and
played.
"steal"
voices if a total of
more than six are
10-* PROGRAM SELECT
On power-up,
the Prophet-600s
select program 00 for
themselves. For simplicity,
when
they are
simply
interconnected, master and slave
program selections are not
linked.
Instead, one
independently selects programs on
both the master and
slave.
However a
coded control function is
provided to enable the slave to
follow master
program changes.
To enable MIDI
program changes, while holding
down the RECORD
then press PROGRAM
SELECT I. This must be done on both units
(after power-up).
Now
whenever the master program is changed, it
will transmit the new program
number to the
slave in two bytes. The status byte again defines
the command and
channel
numbers, while the second byte
contains the program number. For
example,
C0H-62H.
COH CH-
Program Change status
0H= Channel 1
62H
=
program number 98. Range: 00-63H
(programs
00-99)
When the slave
receives this
code,
it switches to Its program 98
and plays in whatever
sound is stored
there.
To
disable MIDI program changes,
again hold RECORD and press 1.
10-5
MOD WHEEL
Likewise, PITCH
and
MOD
wheel information is also
not linked by default, but
can
be
enabled and
disabled with a coded
function performed on both units (and
which links
the
PITCH wheel as well, see
below). Hold RECORD and press
k,
on
both units. Now
whenever
a
change of master MOD wheel
position
is
detected, a three-byte code will
be sent
which codes
the command, the control
number, and the control
value. For
CM600A
12/82
10-3