From las8323@rs175174.ks.boeing.com Tue Oct 09 12:24:33 2001
Subject:Re: Merge box problem

I mighta missed something, but my old Anatek merger works
fine except it seem to only draw power from one jack. If it
doesn't happen to work, just switch to the two inputs and
the "other" unit will seem to power it.

'Course i only merge a few things.

Larry

> Active Sensing is part of the MIDI spec, but MIDI devices are not
> required to implement it; it is an option. Any manufacturer that
> relies on devices implementing it is taking a risk and/or not reading
> the spec clearly.
>
> - jarrell
>
> --- In CloneWheel@y..., "Dan S" wrote:
> > I think what you're referring to is the active sensing message. If so,
> > that's a part of the MIDI protocol and would have nothing to do with the
> > required current/voltage required. The hardware layer must be in place for
> > the software protocol to work.
> >
> > Getting things to work with a specified standard is difficult enough.
> > Counting on unspec'd side effects is a risk that will, as we've heard,
> > result in varying degrees of success/failure.
> >
> > > The word according to Roland was that the MIDI out port
> > > should send an "I'm alive" pulse every so many ms. Some
> > > keyboards don't adhere to this spec so they can't power these
> > > line powered units.
> > >
> > > All my Roland keyboards work fine with my MIDI solutions
> > > merger, but I have some master keyboards made by less 'well
> > > known' manufacturers that mean I always have to make sure I
> > > am merging a Roland MIDI out with one of these for the merger
> > > to work properly. The cheapo controller I use for my
> > Seems that not
> > > everyone has implemented the original spec, because if they
> > > did, these line powered units would work just fine.
>
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