GEM SK760 User Manual

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User Guide
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User Guide
GENERAL SAFETY INSTRUCTIONS
Power source
• Be sure that your local AC mains voltage matches the voltage specified on the name plate before
connecting to the mains.
• DC power cannot be used to power this instrument.
• If the instrument is to remain unused for long periods of time, remove the power cord from its wall
outlet. For safety purposes, remove the power cord in cases of storms with lightning.
Handling the power cord
• Never touch the power cord or its plug with wet hands.
• Never pull on the cord to remove it from the wall socket, always pull the plug.
• Never forcibly bend the power cord.
• If the power cord is scarred, cut or broken, or has a bad contact, it will be a potential fire hazard or
source of serious electric shock. NEVER use a damaged power cord; have it replaced by a qualified
technician.
If water (or other liquid) gets into the instrument
• Do not allow liquids to penetrate the instrument. Do not place containers of liquids on the instru-
ment. If water or liquids penetrate the instrument, remove the power cord from the wall socket at
once, and contact the store where the unit was purchased.
• As a general precaution, never open the unit and touch or tamper with the internal circuitry.
If the instrument plays in an abnormal way
• Turn off the power immediately, remove the power cord from the mains outlet and contact the store
where it was purchased.
• Discontinue using the unit at once. Failure to do so may result in additional damage or other
unexpected damage or accident.
Important notes
• Do not place heavy objects on the instrument and avoid leaning on it.
• Before turning on the instrument, be sure to set the volume to a reasonable level (master volume
slider at about two thirds of the course).
• Before connecting your instrument to other devices, always remember to turn off the power to all
units; this will help to prevent damage or malfunction.
General user maintenance
• Clean the outer surface of your instrument using a soft, clean, slightly damp cloth and polish with a
soft, dry cloth.
• Never use industrial cleaners, detergents, abrasive cleansers, waxes, solvents or polishes as they
may damage the instrument finish.
• Always turn off the power supply after use and never turn the unit on and off repeatedly in quick
succession as this places an undue load on the electronic components.
GENERAL SAFETY INSTRUCTIONS
Power source
• Be sure that your local AC mains voltage matches the voltage specified on the name plate before
connecting to the mains.
• DC power cannot be used to power this instrument.
• If the instrument is to remain unused for long periods of time, remove the power cord from its wall
outlet. For safety purposes, remove the power cord in cases of storms with lightning.
Handling the power cord
• Never touch the power cord or its plug with wet hands.
• Never pull on the cord to remove it from the wall socket, always pull the plug.
• Never forcibly bend the power cord.
• If the power cord is scarred, cut or broken, or has a bad contact, it will be a potential fire hazard or
source of serious electric shock. NEVER use a damaged power cord; have it replaced by a qualified
technician.
If water (or other liquid) gets into the instrument
• Do not allow liquids to penetrate the instrument. Do not place containers of liquids on the instru-
ment. If water or liquids penetrate the instrument, remove the power cord from the wall socket at
once, and contact the store where the unit was purchased.
• As a general precaution, never open the unit and touch or tamper with the internal circuitry.
If the instrument plays in an abnormal way
• Turn off the power immediately, remove the power cord from the mains outlet and contact the store
where it was purchased.
• Discontinue using the unit at once. Failure to do so may result in additional damage or other
unexpected damage or accident.
Important notes
• Do not place heavy objects on the instrument and avoid leaning on it.
• Before turning on the instrument, be sure to set the volume to a reasonable level (master volume
slider at about two thirds of the course).
• Before connecting your instrument to other devices, always remember to turn off the power to all
units; this will help to prevent damage or malfunction.
General user maintenance
• Clean the outer surface of your instrument using a soft, clean, slightly damp cloth and polish with a
soft, dry cloth.
• Never use industrial cleaners, detergents, abrasive cleansers, waxes, solvents or polishes as they
may damage the instrument finish.
• Always turn off the power supply after use and never turn the unit on and off repeatedly in quick
succession as this places an undue load on the electronic components.
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System Exclusive A•29
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System Exclusive A•29
DEVICE INQUIRY
To be able to identify a MIDI device, the following two messages are utilized; the first used for the inquiry:
INQUIRY MESSAGE:
F0H = System Exclusive Message status
7EH = Non-Real Time extension
cc = device ID
06H= INQUIRY ID
01H = Identity Request
F7H = EOX
and the second for the device response:
RESPONSE MESSAGE:
F0 7E cc 06 02 mm ff ff dd dd ss ss ss ss F7
cc = device ID
mm = Manufactures Sistem Exclusive id code
ff ff = Device family code (14 bits, LSB first)
dd dd = Device family member code (14 bits, LSB first)
ss ss ss ss= Software revision (format device specific)
UNIVERSAL REAL TIME SYSTEM MESSAGES
DEVICE CONTROL
These messages are used to control the general functions of the system, without refering to a specific MIDI channel and, therefore, inserted in the
context of the Universal messages.
Master Volume:
F0H = System Exclusive Message status
7FH = Real Time extension
cc = device ID
04H= Device Control ID
01H= Master Volume ID
vv vv = Volume (LSB first)
F7H = EOX
SYSTEM REALTIME MESSAGES
ADDRESS DATA INTERFACE
The MIDI System Exclusive capabilities of the WK Series instruments allow you to manipulate all parts of the instrument’s memory from a computer
system.
The following is a reference to the SysEx protocol used by the WK Series instruments. This Data Address Interface is based on two principal
functions: SET and GET. SET is used to set the contents of some of the instrument’s resources while GET is used to withdraw them.
At the reception of a GET message, the instrument replies with an appropriate SET message containing the values of the requested data and
relative checksums.
status data EOX
GET F0 2F 3c 00 id aa1 aa2 aa3 ss1 ss2 ss3 cc F7
SET F0 2F 3c 01 id cf aa1 aa2 aa3 dd1 ... ddn cc F7
F0H = System Exclusive Message status
2FH = ID number (manufacturer ID) = GENERAL MUSIC
3cH = Command ID: 3 RealTime, c = Device ID (0-F)
00H/01H=Get subfunction / Set subfunction
id = Model ID, 00 = WK4
cf = c = checksum (0:1), f = Data Format (0:4)
1
c=1 checksum present, c=0 absent;
aa1:3 = starting address code (MSB first)
ss1:3 = amount of required data bytes (MSB first)
dd1 = Data byte : first data byte to be sent
ddn = Data byte : last data byte to be sent
cc = checksum ( optional )
F7H = EOX ( End Of Exclusive )
EXTREMELY IMPORTANT : when parameters have positive values that exceed 127 (=7FH), always enter f=2 in the cf field of the SET stream and
transform the data into nibble format as in the example: 134 = 0x86 becomes 0x08 0x06.
N.B.: in the following address map, the undefined value xx that parameterizes some of the addresses is the number relating to the structure (typically
track or note).
DEVICE INQUIRY
To be able to identify a MIDI device, the following two messages are utilized; the first used for the inquiry:
INQUIRY MESSAGE:
F0H = System Exclusive Message status
7EH = Non-Real Time extension
cc = device ID
06H= INQUIRY ID
01H = Identity Request
F7H = EOX
and the second for the device response:
RESPONSE MESSAGE:
F0 7E cc 06 02 mm ff ff dd dd ss ss ss ss F7
cc = device ID
mm = Manufactures Sistem Exclusive id code
ff ff = Device family code (14 bits, LSB first)
dd dd = Device family member code (14 bits, LSB first)
ss ss ss ss= Software revision (format device specific)
UNIVERSAL REAL TIME SYSTEM MESSAGES
DEVICE CONTROL
These messages are used to control the general functions of the system, without refering to a specific MIDI channel and, therefore, inserted in the
context of the Universal messages.
Master Volume:
F0H = System Exclusive Message status
7FH = Real Time extension
cc = device ID
04H= Device Control ID
01H= Master Volume ID
vv vv = Volume (LSB first)
F7H = EOX
SYSTEM REALTIME MESSAGES
ADDRESS DATA INTERFACE
The MIDI System Exclusive capabilities of the WK Series instruments allow you to manipulate all parts of the instrument’s memory from a computer
system.
The following is a reference to the SysEx protocol used by the WK Series instruments. This Data Address Interface is based on two principal
functions: SET and GET. SET is used to set the contents of some of the instrument’s resources while GET is used to withdraw them.
At the reception of a GET message, the instrument replies with an appropriate SET message containing the values of the requested data and
relative checksums.
status data EOX
GET F0 2F 3c 00 id aa1 aa2 aa3 ss1 ss2 ss3 cc F7
SET F0 2F 3c 01 id cf aa1 aa2 aa3 dd1 ... ddn cc F7
F0H = System Exclusive Message status
2FH = ID number (manufacturer ID) = GENERAL MUSIC
3cH = Command ID: 3 RealTime, c = Device ID (0-F)
00H/01H=Get subfunction / Set subfunction
id = Model ID, 00 = WK4
cf = c = checksum (0:1), f = Data Format (0:4)
1
c=1 checksum present, c=0 absent;
aa1:3 = starting address code (MSB first)
ss1:3 = amount of required data bytes (MSB first)
dd1 = Data byte : first data byte to be sent
ddn = Data byte : last data byte to be sent
cc = checksum ( optional )
F7H = EOX ( End Of Exclusive )
EXTREMEL
Y IMPORTANT : when parameters have positive values that exceed 127 (=7FH), always enter f=2 in the
cf field of the SET stream and
transform the data into nibble format as in the example: 134 = 0x86 becomes 0x08 0x06.
N.B.: in the following address map, the undefined value xx that parameterizes some of the addresses is the number relating to the structure (typically
track or note).

GEM SK760 Specifications

General

Brand	GEM
Model	SK760
Category	Electronic Keyboard
Language	English