After digging out the scope and checking voltage levels on
everything - the 190-2's were fine. It turned out to be
two A110's which are for some reason tuned an octave lower
than all my other A110's, ie same range and tune settings give
a tone 1 octave lower.

No idea how that has happened. These two A110's are a little
older than my others (probably 5-6 years old), but it doesnt
look to be drift as they exactly 1 octave out. The range switches
look OK, and stop at -2 in the normal way. Mmmm.

The three MIDI units are in separate racks, so the CV/gate is
not cross connected. I'm putting together a 3 note polysynth
with Doepfer units. Each voice has 3 oscillators, 2 filters,
2 ADSRs, 3 LFO's, mixers, ring mod, and various other bits.

--- In Doepfer_a100@yahoogroups.com , RICHARD HORSMAN <richyho@...> wrote:
>
> Are they all disconnected from the gate and CV bus
>
>
>
>
> ________________________________
> From: silvercreekvalley <silvercreekvalley@...>
> To: Doepfer_a100@yahoogroups.com
> Sent: Thursday, 3 June, 2010 17:01:49
> Subject: 1 chained A-190-2's give strange results
>
>  
> I've got three A-190-2 (MIDI->CV converters) chained together so that the out from one goes to the 'in' on the other. I'm using the PCB pins for MIDI IN/OUT to do this as per the manual.
>
> I've set the key mode to 'stack', and set all the 190-2's so that they receive on midi channel 1.
>
> The three units all work, and as I press keys, the appropriate 190-2 triggers (ie the third unit triggers if 2 keys are already held down).
>
> However, while the pitch on the first unit is fine (its connected to a A110), on the second and third units the pitch is 2 or 3 octaves lower. In fact its just clicks.
>
> Any ideas what I've done wrong For the three A110 modules, the range and tune settings are all identical.
>
>
>
>
> [Non-text portions of this message have been removed]
>