Dear Dieter,

Thank you for the elaborate explanation.

--- In Doepfer_a100@yahoogroups.com , <yahoo@...> wrote:
>
> > Dear group,
> >
> > Just like Bakis I want to wish you all a good 2012!
> >
> > But now, something completely different.
> >
> > When plugging in headphones in an audio out connector (VCA,
> > mixer) I hear both the left and right channel.
> > However, if I route the audio out through a multiples, the audio
> > signal is halved, only the left channel is left.
> > Is this caused by a difference in the audio out and multiples connectors
> > Hope someone can tell.
> >
> > Warm regards,
> >
> > Ton
>
> Also from me Best Wishes for the New Year!
>
> The mechanical construction of monophonic 3.5 mm jacks and plugs is
> different from stereophonic versions. Parts of the long GND sector of the
> monophonic versions is used in the stereophonic versions as the second
> signal. It depends upon the mechanical tolerances and the plug-in depth what
> happens if a stereophonic plug is connected to a monophonic socket.
> Typically the second stereo signal will be dead as the corresponding sector
> of the plug is not connected or connected to GND (depends upon the
> mechanical details of the monophonic jack socket). But there might be an
> intermediate plug-in position where the monophonic signal appears on both
> stereo channels.
>
> As there exists no technical specification that describes what happens if a
> 3.5 mm stereo plug is connected to a monophonic 3.5 mm socket you will have
> to try it out. In the A-100 two different 3.5 mm sockets are used (vertical
> and horizontal) and maybe they behave different.
>
> Best wishes
> Dieter Doepfer
>