Common System Commands; Clock; Start, Continue; Reset - Roland SH101-M Owner's Manual

SH101-M

5.2. COMMON SYSTEM COMMANDS

5.2.1. CLOCK

If any other mode than "MIDI" mode is selected by CTRL - Clock Mode parameter, MIDI Clock
commands are ignored.
In "MIDI" mode, the interface receives MIDI Clock commands for the synchronization pulses for
arpeggiator and sequencer – they are synchronized with the tempo of played song. Rate of generated
synchronization pulses is controlled by "CTRL – Clock Rate" parameter (see table 3).
Maximal speed is limited by the hardware construction of the SH-101. This may cause under
extremely fast MIDI song tempos, the synchronized arpeggio / sequencer irregularities or some tones
might be omitted.

5.2.2. START, CONTINUE

START and CONTINUE commands can be accepted only in "Fixed" and "MIDI" modes selected
by CTRL - Clock Mode parameter. The Start Sync system parameter has to be allowed ("On") as well.
If START and CONTINUE commands are allowed, clock pulses generated by the interface are
synced with Start and Continue MIDI commands. A clock pulse is generated immediately and new
period of clock pulses starts each time the Start or Continue MIDI command is received.

5.2.3. RESET

When the Reset command is received, a complete hardware reset of the interface is executed –
all interface's circuits are set to their default status (same as after the instrument is switched on) and
the interface is switched to stand-by mode.

5.3. SYSTEM EXCLUSIVE MESSAGES

The interface is equipped by the System Exclusive communication protocol, that enables bi-
directional data flow of the memory bulk dumps and some system functions. Detailed description of the
System Exclusive communication is in separate manual.
Attached CD-ROM contains software generator for creation of SysEx Messages for
communication between the interface and MIDI host system. The software generator can create easily
any kind of message necessary for the interface control.

6. LIMITATION OF THE INTERFACE OPERATION AND RECOMMENDED SETTING

It is recommended to calibrate the SH-101 accordingly to the instructions in service manual of
the SH-101 prior the interface installation. Especially instrument's keyboard DAC and VCO should be
adjusted as precisely as possible. This ensures trouble-free operation of the interface. However, a
minor shifts from ideal setting can be eliminated by calibration procedure of the interface's DAC (see
appendix E).
When the interface is in "Keyboard" working mode (see chapter 3.2), it is impossible to use
Arpeggio, Sequencer, Hold and Key Transpose functions and keyboard of the instrument. If any key on
instrument's keyboard is pressed or any of the above mentioned functions are switched on, there is no
response since the CPU of the instrument is disconnected from other circuits in the "Keyboard" mode.
However, all other control elements on SH-101 instrument's panel stay fully functional when the
instrument's keyboard is played from MIDI.
BENDER lever controller functionality depends on CTRL - Bender Mode parameter settings. In
"MIDI" mode, manual BENDER lever controller is disconnected and its function is substituted by MIDI
Pitch Bend (Wheel) command.
It is recommended to set the VCF - FREQ slider on the SH-101 panel to its maximum level (10)
while the interface is active. It enables full VCF modulation range by the interface.
No part of this publication may be reproduced in any form without the written permission of CHD Elektroservis.
MIDI Interface for Roland SH-101
Copyright © 2017 CHD Elektroservis. All rights reserved.
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Model 8-438 ver. 1.0