Doepfer MSY2 Midi to Sync Interface
Contents
1. Picture 3 Valences of DIP switches for Clock dividing factor The valence of the switches increase in the 2 s power rule 1 2 4 8 To obtain the resulting dividing factor you have to add 1 to the calculated value from the table above Example To obtain a dividing factor of 6 you have set the switches 2 and 4 to off and the switches 1 and 3 to on This results in the valences 0 4 0 1 5 If you add 1 you get the resulting factor 6 Normally you will not have to calculate the dividing factor rather you try some switch settings to find the desired SYNC clock divider As a rule only the lower factors 1 1 1 6 are making sense You should start with the maximum Clock i e dividing factor 1 and increase the dividing factor if the device controlled by the MSY2 is running too fast Pay attention that some of the devices to be controlled by MSY2 additionally enable to change the dividing factor inside the device e g TR808 prescale Devices with a SYNC socket normally can be driven with the maximum speed i e dividing factor 1 The MIDI Clock is defined as 96 beats per measure To obtain an even SYNC Clock like 32 16 or 8 beats per measure the dividing factor must be a multiple of 3 e g 96 3 32 96 6 16 96 12 8 Especially for non SYNC applications e g arpeggio of a synthesizer you will need such even Clocks Clock dividing Clock factor polarity aaa 8421 Start Stop polarity Picture 4 Location and func2. CLOCK signals the START LED will light up and the CLOCK LED will flash indicating the tempo Because of the inertia of the eye higher frequencies are not perceptible In case of an incoming MIDI STOP event the Start Stop LED turns off and normally the Clock LED as well as most of the MIDI devices stop the transmission of Clock events in Stop mode In case that the MIDI transmitter is sending Clock events in the stop mode too the Clock LED will continue flashing If one of the two SYNC outputs of the MSY2 is connected faultless to your device equipped with a SYNC input socket it should respond to the MIDI events i e start stop and change the tempo via MIDI If the two LEDs of the MSY2 display properly but your device does not respond there is probably a fault in the connection between MSY2 and your device unsuitable cable or the SYNC input of your device is not switched to SYNC In or the SYNC input is not in accordance with the SYNC standard If you want to slow down the SYNC clock frequency you may change the CLOCK DIVIDING FACTOR The factory setting is 1 1 conversion i e each MIDI Clock trigger a SYNC Clock pulse To change the dividing factor you have change the setting of the first 4 DIP switches located at the bottom of the MSY2 case The dividing factor can be set between 1 and 16 The valences of the 4 DIP switches are 8 4 2 1 from left to right see pictures 3 and 4 MSY2 User s Guide Page 3 DIP switch Valence off
3. an VDE approved AC adapter but MSY2 will work with every AC adapter being in accordance with the following specifications The adapter must be able to deliver 7 12 V DC unstabilized or stabilized voltage as well as a minimum current of 100 mA The POLARITY of the low voltage plug connected to the MSY2 must be pin 7 12V and ring GND see sketch on the MSY2 housing If the polarity is incorrect MSY2 will not function However there is no danger of damage to the circuitry since it is protected by a diode If the MSY2 is used in Germany the external power supply must be VDE approved When using an external power supply the MSY2 is SWITCHED ON by plugging the AC adapter into a wall outlet and connecting it to the jack labeled 9V DC of the MSY1 There is no separate ON OFF switch OPERATION After power on vie external AC adapter or MIDI In the Clock LED must light up and remain on until the first MIDI clock event occurs During this period the Clock LED works as a power indicator If the Clock LED does not light up the AC adapter used is not suitable or does not work or the power supply via MIDI In is not possible see preceding chapter or the MIDI transmitter is already sending MIDI Clock events In the last cast you should set the MIDI transmitter to Stop mode normally by pressing a Stop button Most MIDI devices stop transmission of MIDI Clock events during stop mode In case of an incoming MIDI START event normally followed by MIDI
4. it with a MIDI synchronized Clock signal Use a suitable cable Normally a cable with a 1 4 mono jack plug on one side device and a 3 5mm miniatur mono jack plug MSY2 on the other side will be used POWER SUPPLY MSY2 does not have a built in power supply It can be supplied in two different ways e power supply via MIDI In e power supply via external AC adapter We recommend the power supply with an external AC adapter as this type of power supply will work under all circumstances So the factory setting of the power select jumper see below is for external AC adapter If you want to supply the MSY2 via MIDI In the MIDI transmitter must correspond 100 to the MIDI standard i e pin 4 of MIDI out must be connected to 5V via a resistor of 220Q and pin 2 must be connected to Gnd We found that some MIDI devices do not comply with this demand To check whether your MIDI transmitter is suitable for this type of power supply you have to do the following Open the case of the MSY2 by removing the 4 screws using a suitable tool Inside you see the pc board of the MSY2 with 2 possible jumper locations eyes jumper for power supply via AC adapter SYNCL SYNCZ clack ST ST jumper for power MIDI IN MIDI THRU
5. supply via MIDI In ay DC E a x FA z o 2S ug 5 u gt xO s2 oa a W a a MSY2 version 1 MSY2 version 2 Picture 2 jumper location for power supply selection One of the jumpers is located near the power supply connector If this jumper is set the MSY2 is supplied from an external AC adapter 7 12V 100mA minimum This is the factory setting If the jumper near the MIDI In socket is set the MSY2 is supplied from MIDI if the MIDI transmitter used is 100 MIDI compatible Only one of the two jumpers is allowed to be set Otherwise the MSY2 will be damaged If none of the two jumpers is set the MSY2 will not work When connecting the MSY2 to MIDI Out of the controlliung device the Clock LED must light up and remain on until the first MIDI clock event occurs If this happens the power supply viy MIDI is possible Otherwise the MSY2 must be supplied from an external AC adapter MSY2 User s Guide Page 2 Pay attention if you open and close the MSY2 case Use only a suitable screw driver We cannot take back units if the case or LEDs are damaged and the warranty will be lost during such manipulations If you are not sure whether your are able to do the modification send the unit to your local dealer or to Doepfer Musikelektronik Graefelfing Germany The external power supply AC adapter is NOT included with the MSY2 and must be purchased locally by the user We recommend
6. MIDI TO SYNC INTERFACE MSY2 User s Guide English www doepfer com INTRODUCTION MSY2 is an interface that converts the MIDI realtime events CLOCK START and STOP into the corresponding signals CLOCK and START STOP of the SYNC standard The SYNC standard is used in vintage drum computers or sequencers such as the Roland TR808 rhythm composer or the TB303 bass line SYNC CLOCK is a periodic TTL signal 0 5V representing the tempo SYNC START STOP is a signal that indicates on the 2 possible states START 5V STOP OV MSY2 enables the 1 1 conversion of MIDI CLOCK to SYNC CLOCK i e 1 MIDI clock triggers 1 SYNC clock pulse as well as the reduction of the tempo by dividing the incoming MIDI clock frequency by an integer factor The factor can be set to any value between 1 and 16 with 4 DIP switches 1 corresponds to the 1 1 conversion 16 is the maximum of frequency reduction i e after 16 MIDI clocks 1 SYNC clock appears The polarity of the CLOCK signal and the polarity of the START STOP can be chosen by 2 DIP switches The SYNC standard is used with vintage sequencers or drum computers like the ROLAND TB303 or TR808 The SYNC standard uses the same type of 5 pole 180 DIN connectors as MIDI But the standards do not fit as other pins are used and the signals are completely different So you always have to distinguish between the MIDI and SYNC connectors w Clock 3 10 Start Stop O 2 O O Gnd Picture 1 pinout of th
7. e SYNC connector CONNECTIONS MSY2 is provided with 2 SYNC connectors parallel for controlling 1 or 2 units equipped with SYNC inputs The CLOCK signal is additionally available at a 3 5mm miniature jack socket to control other functions of synthesizers or drum machines like arpeggio gate or trigger synchronized ti MIDI Clock At the Clock socket appears the Clock signal of the SYNC connector i e with the same dividing factor and voltage level Connect MIDI IN of the MSY2 to MIDI OUT of the MIDI transmitter e g MIDI sequencer MIDI drum computer MIDI master keyboard which is able to generate the MIDI real time events Start Stop and Clock The MIDI THRU of the MSY2 may be connected to MIDI IN of other MIDI devices optional Connect one of the SYNC outputs of the MSY2 to the SYNC In socket of the device to be controlled by the MSY2 The second SYNC ouput may be left open or connected to another device controlled by the MSY2 SYNC output Use a suitable cable for that The pins 1 2 and 3 must be connected MIDI cables are unsuitable f the SYNC socket of your device can be switched between SYNC IN and SYNC OUT switch it to SYNC IN e g TR808 If your device is equipped with SYNC IN and SYNC OUT use only SYNC IN MSY2 User s Guide Page 1 If desired you may connect the Clock output jack to the control input of another device e g the arpeggiator control input of a synthesizer or a drum machin with separate Clock input to control
8. tion of the DIP switches at the bottom The last 2 switches correspond to the polarity of Clock and Start Stop Normally both switches are set to on as this is the standard for SYNC applications factory setting The Clock polarity switch determines whether the falling or rising edge appears on the SYNC clock output when a MIDI clock is received Normally this setting is of no account as the clock pulse width i e the time difference between the falling and rising edge is very small about 4 milliseconds in the 1 1 setting If you have the impression that there is a small time difference between your device and MIDI clock you may change the setting of the clock polarity The Start Stop polarity switch is used only for special applications e g for drum computers with inverse Start Stop control OV Start 5V Stop MSY2 User s Guide Page 4
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