Msb And Lsb - Kurzweil K2600 Musician’s Reference

SysEx Control of KDFX

MSB and LSB

HereÕs an example, which sets a value of 50% for the Wet/Dry mix of the effect on the Aux bus.
WeÕve included both hexadecimal and decimal values.
Hex
Dec
MSB and LSB
The K2600 can accept either unsigned (positive only) or signed (positive and negative) values.
Unsigned values can range from 0 to 255, and signed values can range from -128 to 127. Both of
these ranges require eight bits of MIDI information. Since each byte of MIDI information
contains only 7 meaningful bits, you need two bytes to send eight bits of information. The K2600
interprets these bytes as a two-byte pair and not as unrelated bytes. The Þrst byte, called the
most-signiÞcant byte (MSB) sets the general range of the value, while the second byte (the least-
signiÞcant byte or LSB) sets the speciÞc range. The following table shows several decimal values
and the corresponding MSB-LSB hexadecimal values.
Decimal Value
B-4
F0 07 00
240 7 0
Corresponding
Hexadecimal Value
255 00FF
192 00C0
128 0080
127 007F
64 0040
0 0000
-1 FFFF
-64 FFC0
-127 FF81
-128 FF80
78 1B 2A
120 27 42
Corresponding SysEx Command
MSB LSB
01
01
01
00
00
00
7F
7F
7F
7F
00 00 32
0 0 50
7F
40
00
7F
40
00
7F
40
01
00
F7
247