Drawmer DS301 Руководство по эксплуатации - Страница 16
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Печатать страницуMIDI SYSTEM EXCLUSIVE
System exclusive instructions can be sent to the DS301 in order to remotely
programme or interrogate the user definable MIDI parameters from either a
sequencer or MIDI controller. It must be pointed out that if nonsensical data is
sent to DS301 via MIDI system exclusive messages, then garbage results will
occur. Only attempt this method of programming if you are fully conversant with
MIDI. For this reason we have insisted on including the checksum data byte,
which requires some mathematical calculation. The MIDI messages are listed in
the following tables.
MIDI Data To Programme Parameters.
DESCRIPTION
System
Exclusive
Manufacturers ID
Device Number
Format Number
Byte Count
Data 1
*
Data 2
*
Data 3
*
Data 4
*
Data Block
Checksum
(* = included in checksum)
End Of Exclusive
DATA
HEX
BYTE
11110000
0F0h
00110010
032h
00111111
03Fh
00111111
03Fh
00000100
04h
0000xxxx
0xh
0xxxxxxx
0xxh
0xxxxxxx
0xxh
0xxxxxxx
0xxh
0xxxxxxx
0xxh
11110111
0F7h
-14-
EXPLANATION
System Exclusive Status Byte
ID = "Drawmer Electronics"
Audio Channel 1 of DS301 = 03Fh
Audio Channel 2 of DS301 = 040h
Reserved Format Number implies
Programme Data follows
Number of Data Bytes that follow,
(Always 4 until future updates)
Ranges from 0 to 0Fh, MIDI Channel
for DS301 Audio Channel. (Actual
required MIDI Channel -1)
Ranges from 0 to 07Fh, Send Note
when DS301 envelope is triggered.
(See comments below.)
Ranges from 0 to 07Fh, Lowest Note
that DS301 will trigger from.
Ranges from 0 to 07Fh, Highest Note
that DS301 will trigger from.
Checksum is calculated by:-
Adding negated 8 bit data values and
ignoring the overflow bits. Only the 7
lowest significant bits must be sent!
Temporary Memory Parameters are
updated after this byte. They will
need permanently storing if required.