Doepfer d3c Midi/USB Organ Controller - Manual (Page 8)

d3c Page 8 User's Guide V1.0
in this way:
lower manual: Midi channel 2
upper manual: Midi channel 1
The Midi In of the first d3m in this chain remains unconnected or it is connected to the
Midi Out of the computer that runs the organ emulation (e.g. B4). This connection is only
necessary if a Midi feedback is needed.
Attention: This type of connection contains the risk of a Midi feedback loop ! The Midi
data sent by the computer are passed on in the d3m/d3c chain and consequently appear
again at the Midi In of the computer. One has to pay attention that the software in use
does not pass on the incoming Midi data again to it's output (no Midi "echo" from Midi In
to Midi Out) as this would cause an Midi "avalanche" and probably lead to a crash or
freezing of the computer system.
If the connection is made and the settings of the software are correct (i.e. no Midi "echo")
the new settings after a preset change are displayed with the LEDs of the d3c provided
that the software in use outputs this information via Midi Out. This guarantees a perfect
tuning of hard and software.
For optimal function of the display feedback the update V1.1.5 of Native Instruments B4
is required. This is available only for Mac OS X and Win XP but not for Mac OS 9 !
d3c will work perfect with each version of B4 (Mac OS 9, OS X, Win), but the Mac OS 9
version does not support the feedback function for the LED display of d3c!
If the computer in use has several Midi inputs/outputs available we recommend to
connect the Midi Out of each d3m and d3c to a separate Midi input (rather than daisy
chaining the devices via Midi In/Out) and to connect one Midi Out of the computer to Midi
In of the d3c - paying attention to the remarks mentioned above concerning the Midi loop
problems.
Remark: The Midi input of d3c should be used only for connection to a d3m or d3b module
or another Midi keyboard or bass pedal that transmits only Midi note on/off messages ! The
Midi input is not suitable for large amounts of Midi data (e.g. SysEx strings or Midi messages
coming from a computer sequencer) but only for small data rates like the messages of a
d3m or d3b module. In case of large amounts of incoming Midi messages data loss or delay
may occur.