DOEPFER MSY2 Benutzerhandbuch - Seite 5

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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.
Picture 4: Location and function 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: 0V=Start, +5V=Stop).
DIP switch
Valence "off"
1
8
2
4
3
2
4
1
Clock
dividing
factor
8
4
2
1
1
2
3
4
5
MSY2 User's Guide – Page 4
Valence "on"
0
0
0
0
Clock
polarity
Start/Stop
polarity
6