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MPX 1 MIDI Implementation Details
Message Tables
Throughout this document, SysEx messages are shown as Message Tables to provide a consistent
method of describing the contents of each message class. The tables are organized into rows of related
groups of bytes and columns containing the attributes of each field. For example, the System Configu-
ration message table is defined as follows:
Transmit only
Byte #
Byte Value
1
F0
2
06
3
09
4
0bbb bbbb
5
00
6-7
0n
8-9
0n
The first column indicates the Byte # of a particular field.
The second column indicates the byte value. This value is generally presented in hex, but may also appear
in binary. In some cases the value is a fixed number (for example: Lexicon ID) while others may vary.
Values that can change are represented using a combination of numbers and letters. Binary numbers,
for instance, are represented using a lower case "b" for each variable bit in the value (for example: Device
ID: 0bbb bbbb). The "b"s can represent 1s or 0s. Hex numbers which can use different numbers in the
lower nibble are represented by a lower case "n" which can represent any hex number between 0 and F.
Although only a single "0n" is indicated in the Value column for certain fields, these fields will often consist
of multiple bytes (each of which uses the format: 0n). This is due to nibble-ization, and to the fact that a
single field can describe a group of more than 1 byte (strings, for example). In these cases, the Description
column will generally indicate the number of bytes of un-nibble-ized data contained in the field.
2
Description
Sysex ID (Start)
Lexicon ID
MPX 1 ID
Device ID
System Configuration
Major Version (1 byte)
Minor Version (1 byte)
Notes
0-127
The number that appears to the left of the decimal point on
the power up display. Example: V1.00
Lexicon
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