[sdiy] problem with a midi>cv converter... or is it a feature?

[John Speth]

I agree too.  The schematic isn't very complicated.  The S/H DMUX chips
have a tri state control line that I'll bet is not getting toggled.  The
sample phase of the sample/hold is working but the hold phase is not
working.  Trace back from the tri state control and you'll find your part
failure.

JJS

> -----Original Message-----
> Sent: Thursday, October 16, 2014 11:16 AM
ubject: Re: [sdiy] problem with a midi>cv converter... or is it a feature?
>
> Agreed. Maybe bad caps or the op-amp that follows.
>
> On 10/16/2014 10:30 AM, Tom Wiltshire wrote:
> >
> > To try and answer the question in the subject: I think this must be a
> fault.
> >
> > I find it extremely difficult to believe that someone (least of all
Roland)
> would design a unit that turns the Note CV off when it receives a Note
Off.
> Any sound with a noticeable release is going to sound weird. Why would
you do
> that? Roland aren't that stupid. So I'm left thinking it must be a
fault.
> >
> > Assuming it is, we need to try and find it:
> >
> > Does it do it on all the channels?
> > Does it do it in all modes? (MONO, 2 VOICE, etc) Do the Dynamics CV
> > show the same effect (they're on the other DMUX)
> >
> > HTH,
> > Tom
> >
> >
> > On 16 Oct 2014, at 16:08, henry birdseye <henry.birdseye at gmail.com>
wrote:
> >
> >> I'm having a situation with my MPU-101 coming out of a DAW.
> >>
> >> Here's a description with photo of the problem/feature.
> >> http://dibcadbu.com/sequencing-with-a-roland-mpu-101/
> >>
> >> Can the Roland be modified not to behave this way?
> >>
> >> HB
> >> _______________________________________________
> >> Synth-diy mailing list
> >> Synth-diy at dropmix.xs4all.nl
> >> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> >
> > _______________________________________________
> > Synth-diy mailing list
> > Synth-diy at dropmix.xs4all.nl
> > http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> >
> >
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy