Hello,

the technical document is correct and so far no customer complained about
the document (I know many users who connected their Dark Energy in the way
that is described in the document). The way how you connected the two units
is not how it is planned. When you connect both JP6 you make a short circuit
between both Midi inputs (i.e. the Midi inputs of both units obtain the same
Midi information). This may work by chance ("by chance" because the
opto-coupler outputs and pull-up resistors are shortened). But this is
totally compared to the connection that is described in the Dark Energy
document. The idea was to connect the Midi output of the first unit to the
Midi of the second one. That way it's possible to realize kind of a
polyphonic structure. When the first Dark Energy is set to "stack mode" the
Midi note message that is used to generate the tone of the first Dark Energy
is NOT forwarded to the Midi output. Only additional Midi note messages (not
used in the first Dark Energy) are passed on to the Midi output.

Consequently if you want that both Dark Energy run in parallel (i.e.
generating the same tone) the highest or last note priority has to be chosen
(NOT stack mode) with this kind of connection. Only if you want the
pseudo-polyphonic feature the stack mode has to be selected.

Of course if both units are adjusted to different Midi channels the stack
feature has no meaning.

Best wishes
Dieter Doepfer

> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com
> [mailto: Doepfer_a100@yahoogroups.com ]Im Auftrag von blair_cowan@...
> Gesendet: Samstag, 4. Januar 2014 04:31
> An: Doepfer_a100@yahoogroups.com
> Betreff: Re: 1 Linking A Dark Energy mk 1 and a Dark Energy
> mk2
>
> Hi,
>
> regarding my earlier post about linking (not stacking) two dark
> energy units using the internal midi thru buss:
>
> I connected my two dark energy's using the supplied jumper lead,
> making sure that the the lead was plugged into JP5 of the sending
> unit, and JP6 of the receiving unit. I also ensured that the
> polarity was correct - ground to ground, and live to live. This
> did not link the two dark energy synths.

Maybe you have chosen the stack mode on the first unit. Then "monophonic"
Midi note messages will be not transmitted.

> In fact, to link two dark energy's via the midi thru buss, I
> found I had to connect JP6 of the sending unit to JP6 of the
> receiving one. Now when I connect to the midi in socket of the
> sending unit and play a note on my keyboard, both dark energy's
> respond at the same time, and with the same note.

That's the "Midi in short circuit" mentioned above

> Florian, the issue here is not about including "a full midi
> compendium" in the Dark Energy manuals, but instead about
> including an entry in "section 3.4. Linking / stacking several
> Dark Energies" to the effect that if you want to link (as opposed
> to stack) two dark energy's together using the internal midi thru
> buss, employ a jumper lead between JP6 of each machine.
>
>
> Deiter,
>
>
> would it be possible to update the online manuals to reflect
> this It might save other users a bit of time and frustration.

I don't think so.

> Kind regards,
>
>
> Blair.
>
>
>
>
>
>
>