CHD 8-432, Руководство пользователя

Страница: 3 / 12

JP4-KBD
MIDI Interface forJupiter-4 Keyboard
Model 8-432 ver. 2.0
Copyright © 2012 CHD Elektroservis
All rights reserved. No part of this publication may be reproduced in any form without written permission of CHD Elektroservis.
3
1. INTRODUCTION
JP4-KBD is a MIDI retrofit for Roland Jupiter-4 synthesizer. The device enables Jupiter´s tone
generators to be controlled via MIDI as a MIDI expander. JP4-KBD also synchronizes instrument’s
arpeggiator speed with external MIDI clock.
All JP4-KBD functions can be adjusted via MIDI commands. Standard channel and system
messages or System Exclusive Messages can be used. MIDI communication channel is user
definable.
Setting of all parameters can be stored in internal user memory. Table 1 shows default factory
settings.
Table 1 – “Factory Reset” settings of interface functions
Function Setting Value of corresponding parameter
MIDI channel choice 12
th
channel MIDI Channel : 11
Keyboard shift setting +48 semitones Key Shift : 48
Key priority setting last key priority Key Priority : 0
Pitch Wheel range setting
±
12 semitones Pitch Wheel Range : 12
Arpeggiator rate setting internal generator Arpeggio Clock Rate : 0
1.1. INTERFACE FUNCTIONS
Interface controls the instrument’s keyboard in parallel manner. The instrument can be
controlled from its own keyboard and from the interface simultaneously. Interface controls also tempo
of instrument’s arpeggiator. The tempo is controlled by internal instrument’s clock generator or it is
derived from external MIDI clock. See pic. 1.
Pic. 1 – Block diagram
2. INTERFACE BASIC OPERATION
There are no indicators or switches on the interface. All parameters can be adjusted only via
MIDI commands from external MIDI data transmitter. Default settings from internal memory are set up
during each instrument start-up.
All interface functions are adjustable via MIDI controllers or SysEx messages. There are five
user adjustable parameters, described in the following chapters.