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Lexicon
ASCII text versions of this document , the MPX 1 Control Tree and MPX 1 Parameter Descriptions are
available on CompuServe under section seven of the MIDI B forum. To access these documents:
• Enter CompuServe, type GO MIDIBVEN
• Select "section seven: Lexicon"
• Enter the Lexicon library
Overview
This document defines the System Exclusive (SysEx) MIDI implementation used in the Lexicon MPX 1,
and assumes familiarity with the functions and operations of the MPX 1. This document covers both V1.00
and V1.10 software, which was released to support the MPX R1 MIDI Remote Controller.
Data Formatting
With the exception of message headers (first 5 bytes) and "end of SysEx" messages (the last byte in the
message), all data is transmitted in a nibble-ized format, i.e. each byte of data is transmitted as a pair of
bytes, with 4 bits of data in each byte.
As in all other cases in the MPX 1, the less-significant portion of the byte is transmitted first. 16-bit "words"
(2 bytes) are sent low nibble of the low byte, followed by high nibble of the low byte, low nibble of the high
byte, then high nibble of the high byte.
MPX 1
MIDI Implementation Details
MPX 1 V1.10 MIDI Implementation Details
1
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