Roland SH101-M User manual

7
Model 8-438
ver. 1.0
OWNER’S MANUAL
© 2017 CHD Elektroserv is

SH101-M MIDI Interface for Roland SH-101 Model 8-438 ver. 1.0
Copyright © 2017 CHD Elektroservis. All rights reserved.
No part of this publication may be reproduced in any form without the written permission of CHD Elektroservis.
2
Content
page
1. Device description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Interface functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Connection to MIDI system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1. Standard working mode set-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2. Memory back-up set-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Interface operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.1. Initialization sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.2. Instrument control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.3. Indication of working status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4. Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4.1. Global system parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1.1. MIDI Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1.2. Auto Local . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1.3. Start Sync . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1.4. Auto Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1.5. Mod Threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.1.6. Clk Pulse Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.2. Preset parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.2.1. VCO - Key Shift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.2.2. VCO - Aftertouch Bend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.2.3. VCF - Frequency Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2.4. VCF - Key Follow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2.5. VCF - Velocity Amount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.2.6. VCF - Aftertouch Amount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.2.7. VCA - Key Follow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.2.8. VCA - Velocity Amount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2.9. VCA - Aftertouch Amount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2.10. CONTROL - Volume Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2.11. CONTROL - Bender Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2.12. CONTROL - Clock Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2.13. CONTROL - Clock Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2.14. CONTROL – LED Indication Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5. MIDI implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.1. Channel commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1.1. Note On/Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1.2. MIDI Control Changes (CCs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1.2.1. Standard controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1.2.2. Controllers for preset parameters
editing and saving . . . . . . . . . . . . . . . . . . . . . . 17
5.1.3. Channel Aftertouch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.1.4. Pitch Bend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.1.5. Program Change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.2. Common system commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.2.1. Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.2.2. Start, Continue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.2.3. Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.3. System Exclusive Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6. Limitation of the interface operation and recommended setting . . . . . . . . . . . . . . . . . . 19
7. Technical specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8. Warranty conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Appendices
A. MIDI implementation chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
B. Error status indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
C. Eerrors caused by MIDI loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
D. Clock pulses duration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
E. DAC calibration procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

SH101-M MIDI Interface for Roland SH-101 Model 8-438 ver. 1.0
Copyright © 2017 CHD Elektroservis. All rights reserved.
No part of this publication may be reproduced in any form without the written permission of CHD Elektroservis.
3
1. DEVICE DESCRIPTION
SH101-M is a MIDI retrofit for Roland SH-101 synthesizer. The device enables the instrument to
be controlled via MIDI as a MIDI expander. The interface works in one direction only – it receives MIDI
data and converts them to analogue control signals for the SH-101’s BENDER, VCO, VCF, VCA and
CLOCK circuits. The SH-101’s keyboard, control panel sliders and switches are not transmitted as
MIDI data!
1.1. INTERFACE FUNCTIONS
Functional block schematics on the pic. 1. bellow, shows the connection of the interface to the
original circuits of the instrument.
When the interface controls the keyboard of the instrument, the instrument’s keyboard (CV and
GATE generators) is disconnected and the software generators [1 and 2] of the interface are used.
External CV and GATE outputs and inputs remain fully functional as on non-retrofitted instrument and
can be still used.
BENDER lever controller on the instrument’s panel can be disconnected and replaced by the
interface DAC [3].
A voltage regulator is inserted between VCF-FREQ potentiometer of the instrument and VCF
control circuits [4] to control VCF frequency.
Another voltage regulator is inserted between VCA driving and the VCA [5] to control the VCA
output level.
Internal instrument’s clock generator can be replaced with the software generator of the interface
[6]. Input for external clock (EXT-CLK-IN) remains fully functional as on non-retrofitted instrument and
can be still used.
Pic. 1 – Functional block schematics
2. CONNECTION TO MIDI SYSTEM
The interface has connectors for both MIDI input and output. Standard MIDI cables with DIN
41524 connector (5 pins / 180°) are used to connect other MIDI devices.
2.1. STANDARD WORKING MODE SET-UP
Data from host MIDI system (PC, sequencer, master keyboard etc.) are coming to MIDI-IN input
of the interface.

SH101-M MIDI Interface for Roland SH-101 Model 8-438 ver. 1.0
Copyright © 2017 CHD Elektroservis. All rights reserved.
No part of this publication may be reproduced in any form without the written permission of CHD Elektroservis.
4
All MIDI data coming to MIDI input of the interface are transmitted to MIDI-THRU/OUT output of
the interface unaffected (THRU function). The THRU function enables another MIDI device(s) to be
connected without additional MIDI Thru-Box. MIDI input of the other (next in chain) MIDI device can be
simply fed from MIDI-THRU/OUT output of the interface (see pic. 2).
If there are no other MIDI devices to be used, only MIDI-IN cable is necessary (from host system
to MIDI-IN input of the interface).
Pic. 2 – Connection to MIDI system for standard working mode
2.2. MEMORY BACK-UP SET-UP
The interface can transmit its own System Exclusive data. These messages are used for back-
up / recovery of the internal memory settings.
To back-up the memory of the interface, connect MIDI output MIDI-THRU/OUT to MIDI input of
the host system (PC, sequencer…) (see pic. 3).
Pic. 3 – Connection to MIDI system for memory content transfer
Attention! Disable the MIDI ECHO, THRU functions of your sequencer in this case to prevent
communication loops that might “freeze” your MIDI system (see Appendix C.)!
3. INTERFACE OPERATION
The interface has a single manual control element – Reset button – which turns the interface to
stand-by status. All other functions are controlled by MIDI commands. Working status of the interface
is indicated by two-color (red / green) LED.
3.1. INITIALIZATION SEQUENCE
When the SH-101 is switched on, the reset sequence of the interface is executed automatically.
During this sequence, the system parameters are recalled from the system memory bank to the
system working buffer ([3] on pic. 4) and default values of preset parameters are stored in the edit
buffer (see table 2). The interface is now switched in the initial stand-by mode and it does not affect the
SH-101. The instrument can be used usual way like no MIDI interface has been installed. The interface
is now monitoring the incoming MIDI data. Accordingly to the type of MIDI data received the interface
is activated (see chapter 3.2 for Operation modes details).
3.2. INSTRUMENT CONTROL
After the reset of the interface (see above), all control elements of the instrument, including its
keyboard work normally. Interface’s indication LED doesn’t light and MIDI data are transferred from
MIDI input to MIDI-THRU/OUT output of the interface. The interface is prepared for receiving of an
acceptable MIDI command described in chapter 5. There are two basic operation modes available:

SH101-M MIDI Interface for Roland SH-101 Model 8-438 ver. 1.0
Copyright © 2017 CHD Elektroservis. All rights reserved.
No part of this publication may be reproduced in any form without the written permission of CHD Elektroservis.
5
In “Normal” mode (set by default after the interface reset), instrument’s keyboard works
normally and Arpeggio, Sequencer, Hold (both the panel switch and external hold pedal input) and Key
Transpose functions are fully functional. Also all other control switches and sliders on SH-101 panel
remain unaffected.
When the interface is turned to “Keyboard” mode (CC #122 - Local Off/On – see chapter
5.1.2.1) or any incoming MIDI Note-On command is received (see chapter 5.1.1) , SH-101 keyboard is
disconnected and VCO / ENV circuits are controlled by Note-On/Off MIDI commands and various MIDI
CCs (see table 2 for full list). Arpeggio, Sequencer, Hold (both panel switch and and external hold
pedal input) and Key Transpose functions are not available in the “Keyboard” mode. All other control
switches and sliders on SH-101 panel remain fully functional.
To return back to “Normal” mode (to control the instrument from its own keyboard again), use
CC #122 (Local Off/On – see chapter 5.1.2.1) or press interface’s Reset button mounted on panel or
just switch the instrument off/on.
3.3. INDICATION OF WORKING STATUS
The actual interface status is indicated by the bi-color LED .
• The LED is off in “Normal” operation mode of the interface.
• After the interface is switched to “Keyboard” mode, the indication LED lights red continuously.
• If the LED indication function of the interface is enabled (for details see chapter 4.2.14), selected
function is indicated by green light or blinking of the indication LED in “Normal” mode or yellow in
“Keyboard” operation mode.
• If an error occurs, the indication LED starts to blink (for details see Appendix B).
4. PAR AM ETER S
The parameters are divided in two basic groups – global system parameters and preset
parameters – see pic. 4.
Pic. 4 – Structure of the interface internal memory
All parameters are stored in internal memory banks of the interface. There is one memory bank
for system parameters and 32 memory banks for preset parameters available. Content of all memory
banks can be backed-up / restored by Bulk Dump SysEx Messages [6] and [7] (for details see
description of System Exclusive communication).
Content of the system memory bank is always loaded to system working buffer (controlling the
interface CPU) during interface’s reset [3].
The preset can be selected by MIDI Program Change or by SysEx command (for details see
description of System Exclusive communication). Content of the preset memory bank is then loaded to
preset edit buffer [1] controlling the interface’s CPU [2].

SH101-M MIDI Interface for Roland SH-101 Model 8-438 ver. 1.0
Copyright © 2017 CHD Elektroservis. All rights reserved.
No part of this publication may be reproduced in any form without the written permission of CHD Elektroservis.
6
Preset parameters in edit buffer can be changed by MIDI CCs [4] anytime during the device
operation. All such changed settings can be saved in any of the preset memory banks [5] by MIDI
SysEx command (for details see description of System Exclusive communication) or by CC #119 (for
details see chapter 5.1.2.2).
4.1. GLOBAL SYSTEM PARAMETERS
The system parameters control the basic functions of the interface. System parameters are
always valid, independently on the actual selected preset.
System parameters can be changed by Bulk Dump SysEx Messages only (see [7] on pic. 4, for
details see description of System Exclusive communication). However, all system parameters
changes takes effect after interface reset – to do so, press Reset button or switch the instrument off
and on again!
The factory preset values of system parameters are listed in the table below:
Table 1 – Range of valid values and default values of system parameters
Valid values Factory Reset values
Parameter name [dec] [hex] [dec] [hex] Meaning
MIDI Channel 0 ~ 15 00 ~ 0F 0 00 Channel Nr. 1
Auto Local 0 ~ 1 00 ~ 01 1 01 On
Start Sync 0 ~ 1 00 ~ 01 1 01 On
Auto Reset 0 ~ 1 00 ~ 01 1 01 On
Mod Threshold 0 ~ 127 00 ~ 7F 64 40 Middle pos.
Clk Pulse Length 0 ~ 120 00 ~ 78 35 23 8 ms
4.1.1. MIDI CHANNEL
The parameter selects the communication MIDI channel of the interface. It is possible to choose
any of the 16 MIDI channels.
Valid parameter values are 0 ~ 15. Value 0 represents MIDI channel Nr.1, value 1 selects Nr. 2
etc. up to value 15 which selects MIDI channel Nr. 16.
4.1.2. AUTO LOCAL
The parameter enables automatic switching of the interface to the “Keyboard” mode after the first
valid Note-On MIDI command is received (the MIDI Note must be sent on actual MIDI channel and its
number must be in valid range). If the parameter it is set to “Off”, the automatic activation of the
“Keyboard“ mode after first received MIDI note is disabled.
Valid parameter values are 0
~ 1. Value 0 is “Off”, value 1 is “On”.
4.1.3. START SYNC
This parameter works only if CTRL - Clock Mode parameter is set to “Fixed” or “MIDI” (see
chapter 4.2.12). The parameter enables synchronization of clock pulses generated by the interface
with Start and Continue MIDI commands. If the parameter is set to “On”, a clock pulse is generated
immediately and new period of clock pulses starts each time the Start or Continue MIDI command is
received. If the parameter is set to “Off”, the Start and Continue MIDI commands are ignored.
Valid parameter values are 0
~ 1. Value 0 is “Off”, value 1 is “On”.
4.1.4. AUTO RESET
The parameter enables automatic reset of the interface if a MIDI communication problem occurs.
If the parameter is set to “On” and a fatal error in the MIDI communication occurs, the interface stops
operating and returns to basic stand-by mode automatically. If the parameter is set to “Off”, standard
error procedures will be executed (see Appendix B.).

SH101-M MIDI Interface for Roland SH-101 Model 8-438 ver. 1.0
Copyright © 2017 CHD Elektroservis. All rights reserved.
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7
Valid parameter values are 0 ~ 1. Value 0 is “Off”, value 1 is “On”.
4.1.5. MOD THRESHOLD
The SH-101 synthesizer Bender lever works as an On/Off switch for LFO MOD function
(“forward move” of the Bender lever). This function can be controlled by the MIDI CC #1 (Modulation
Wheel). Since the MIDI CC #1 uses continuous range of values 0 to 127, it is necessary to set the
threshold value from which the CC #1 will be considered as being “On”.
Valid parameter values are 0
~
127. Value 0 disables the MIDI CC #1 totally. Values 1 to 127 set
the “On” threshold level of the CC #1 directly to the selected value. It is recommended to set the
parameter value to 64 (the LFO MOD is activated in the middle position of the modulation wheel of the
MIDI master keyboard – it is also factory pre-defined value).
4.1.6. CLK PULSE LENGTH
The parameter defines duration of clock pulses generated by the interface. The duration is
defined by the following formula:
Pulse duration = 0,2*(parametr value + 5) [ms]
Valid parameter values are 0
~ 120. 0 is equal to 1 ms duration up to value 120 equal to 25 ms.
4.2. PRESET PARAMETERS
The preset parameters set the functions of the interface that affect the sound of SH-101
instrument. The preset parameters define the MIDI commands controlling BENDER, VCO, VCF, VCA
and CLOCK circuits of the instrument.
Preset parameters values in edit buffer can be modified by MIDI CCs - it is possible to change
them in a real time during playing the instrument (see [4] on pic. 4). Default values of the preset
parameters retrieved in the edit buffer after the reset (stand-by status) are described in table 2 bellow.
These default values are also stored in all interface preset memory banks after “Factory Reset“
procedure (for details see SysEx communication manual).
Table 2 – Range of valid values and a default values of preset parameters
Range of valid values Stand-by and Factory
Reset values MIDI CC Nr.
Parameter name
[dec] [hex] [dec] [hex] [dec] [hex]
VCO - Key Shift 0 ~ 67 00 ~ 4F 36 24 40 28
VCO - Aftertouch Bend 0 ~ 127 00 ~ 7F 64 40 41 29
VCF – Frequency 0 ~ 127 00 ~ 03 127 7F 42 2A
VCF - Key Follow 0 ~ 127 00 ~ 03 64 40 43 2B
VCF - Velocity Amount 0 ~ 127 00 ~ 7F 0 00 44 2C
VCF - Aftertouch Amount 0 ~ 127 00 ~ 7F 0 00 45 2D
VCA - Key Follow 0 ~ 127 00 ~ 7F 64 40 46 2E
VCA - Velocity Amount 0 ~ 127 00 ~ 02 0 00 47 2F
VCA - Aftertouch Amount 0 ~ 127 00 ~ 7F 0 00 48 30
CTRL - Volume Mode 0 ~ 3 00 ~ 7F 0 00 49 31
CTRL - Bender Mode 0 ~ 1 00 ~ 7F 0 00 50 32
CTRL - Clock Mode 0 ~ 3 00 ~ 7F 0 00 51 33
CTRL - Clock Rate 0 ~ 127 00 ~ 7F 122 7A 52 34
CTRL - Indicator Mode 0 ~ 3 00 ~ 7F 0 00 53 35
Any parameter settings modifications are stored in the edit buffer only and remain valid until the
instrument is switched off or the interface reset by Reset button or a change of the actual preset
number.

SH101-M MIDI Interface for Roland SH-101 Model 8-438 ver. 1.0
Copyright © 2017 CHD Elektroservis. All rights reserved.
No part of this publication may be reproduced in any form without the written permission of CHD Elektroservis.
8
Pic. 5 – “VCO - Key Shift“ parameter
To keep the edited parameter
values in the memory permanently, it is
necessary to save them into a preset
memory bank. There are 32 memory
locations for user settings available. MIDI
CC #119 (see chapter 5.1.2.2) or MIDI
System Exclusive command are used to
save the edited parameters (see [5] on
pic. 4).
Memory backup / restore function
for any of the 32 memory banks is also
supported (see [6] on pic. 4).
4.2.1. VCO - KEY SHIFT (CC #40)
SH101-M interface accepts 61
MIDI notes i.e. five octaves keyboard
range. The acceptable range can be
shifted / transposed by VCO - Key Shift
parameter in whole range of MIDI notes.
Each value corresponds to one
semitone. Valid range of the parameter
is from 0 to 67 (equal to 0 to +67
semitones).
This parameter is active only in the
“Keyboard” working mode of the
interface. The parameter value can be
controlled by MIDI CC Nr. 40 - see
chapter 5.1.2.2.
If no shift is chosen (i.e. parameter
value is equal to 0), lowest key of virtual
keyboard corresponds to MIDI note Nr. 0
and highest key corresponds to MIDI
note Nr. 60. If shift is +1 semitone
(parameter value is equal to 1), lowest
key of corresponds to MIDI note Nr. 1
and highest key corresponds to MIDI
note Nr. 61, etc. up to shift is +67
semitones (parameter value is equal to
67). In the other words, value of the
parameter is equal to number of the
lowest acceptable MIDI note (see pic. 5).
4.2.2. VCO - AFTERTOUCH BEND (CC
#41)
Frequency of the VCO can be
shifted (“bended“) by MIDI Channel
Afterouch. The parameter sets the level
of Channel Afterouch command to affect
the VCO frequency. Maximal VCO
frequency shift is ±4 semitones.
P

SH101-M MIDI Interface for Roland SH-101 Model 8-438 ver. 1.0
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9
Pic. 6 – “VCO - Aftertouch Bend” parameter
This parameter is active only in the
“Keyboard” working mode of the interface. The
parameter value can be controlled by MIDI CC
Nr. 41 – see chapter 5.1.2.2.
The parameter value can be set in range
of 0 to 127. If the value is equal to 64, MIDI
command Channel Aftertouch doesn’t affect
instrument’s VCO frequency at all. For
parameter values from 65 to 127, VCO
frequency is increased directly proportionally to
the value of the Channel Aftertouch command
(frequency is increased by +4 semitones for
maximum Channel Aftertouch value = 127). For
parameter values from 63 to 0, VCO frequency
is decreased directly proportionally to value of Channel Aftertouch command (frequency is decreased
by -4 semitones for maximum Channel Aftertouch = 127) - see pic. 6.
4.2.3. VCF - FREQUENCY CONTROL (CC #42)
Pic. 7 – “VCF – Frequency” parameter
The parameter enables to decrease the
basic cutoff frequency of the VCF (set by the
VCF - FREQ slider on the instrument’s panel).
Value of the parameter can be set in range of 0
to 127. If the parameter value is equal to 127,
the basic frequency of VCF set by the VCF
FREQ slider isn’t affected. When the parameter
value is decreased, basic cut-off frequency of
the VCF is decreased accordingly, up to the
parameter value is equal to 0 when VCF is
closed fully (see pic. 7).
The parameter value can be controlled
by MIDI CC Nr. 42 – see chapter 5.1.2.2.
Remark: Since the interface cannot increase
the frequency of the VCF (“move the VCF - FREQ slider upwards”) on the instrument’s panel, it is
recommended to set the slider to maximum position (10) while the interface is active. This setting
enables full VCF cut-off modulation range by MIDI commands.
Pic. 8 – “VCF – Key Follow” parameter
4.2.4. VCF - KEY FOLLOW (CC #43)
The parameter sets the level of VCF cut-
off frequency modulation by the position of the
played key on the master keyboard (i.e. tone
height).
This parameter is active only in the
“Keyboard” working mode of the interface. The
parameter value can be controlled by MIDI CC
Nr. 43 – see chapter 5.1.2.2.
The parameter value can be set in the
range of 0 to 127. If the value is equal to 64,
VCF isn’t affected by key position. For the
parameter values from 65 to 127, VCF cut-off

SH101-M MIDI Interface for Roland SH-101 Model 8-438 ver. 1.0
Copyright © 2017 CHD Elektroservis. All rights reserved.
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10
frequency is increased directly proportionally to MIDI note number. For parameter values from 63 to 0,
VCF cut-off frequency is decreased directly proportionally to MIDI note number (see pic. 8).
Remark: It is recommended to set the VCF - KYBD slider on the instrument’s panel to its minimum
position (0) while the interface is active so that “key follow” function is not doubled.
Pic. 9 – “VCF – Velocity Amount” parameter
4.2.5. VCF - VELOCITY AMOUNT (CC #44)
The parameter sets the key velocity
modulation amount of the VCF cut-off
frequency. Cut-off frequency of the VCF can
be increased directly proportional to the MIDI
velocity value. Value of the parameter can be
set in the range of 0 to 127. For the value
equal to 0, VCF isn’t affected by the velocity
data, parameter value equal to 127 provides
maximal modulation level (see pic. 9).
This parameter is active only in the
“Keyboard” working mode of the interface. The
parameter value can be controlled by MIDI CC
Nr. 44 – see chapter 5.1.2.2.
Pic. 10 – “VCF – Aftertouch Amount” parameter
4.2.6. VCF - AFTERTOUCH AMOUNT (CC
#45)
The parameter sets the modulation
amount of the VCF cut-off frequency by the
Channel Aftertouch MIDI command (key
pressure). Cut-off frequency of VCF can be
increased directly proportional to the value of
Channel Aftertouch. Value of the parameter
can be set in the range of 0 to 127. For the
value equal to 0, VCF isn’t affected by
Channel Aftertouch, for parameter value equal
to 127 provides maximal modulation level (see
pic. 10).
This parameter is active only in the “Keyboard” working mode of the interface. The parameter
value can be controlled by MIDI CC Nr. 45 – see chapter 5.1.2.2.
Pic. 11 – “VCA – Key Follow” parameter
4.2.7. VCA - KEY FOLLOW (CC #46)
The parameter sets the modulation
amount of the VCA by the position of the
played key on the master keyboard (i.e. tone
height). Value of the parameter can be from 0
to 127. If the value is equal to 64, VCA isn’t
affected by key position. For the parameter
values from 65 to 127, VCA level is increased
directly proportionally to MIDI note number.
For parameter values from 63 to 0, VCA level
is decreased directly proportionally to MIDI
note number (see pic. 11).
This parameter is active only in the