Doepfer

Dieter,

Thanks for getting back to me.  I don't check that email address very 
often.  I'll take this offline with you now.

David

--- In Doepfer_a100@yahoogroups.com, "Dieter Doepfer" <hardware@...> 
wrote:
>
> David,
> 
> I have sent you an email on April 18, 2006 (to you directly) with 
this
> question and got no answer so far:
> 
> I have problems to understand what you mean with the extra 
triggers. Does
> this mean that a trigger appears even if the corresponding switch 
is "off" ?
> I could not understand this as the switch interrupts the trigger 
line in the
> "off" state. Please specify when (at which position) the extra 
triggers
> appear.
> 
> Best wishes
> Dieter Doepfer
> 
> > -----Ursprüngliche Nachricht-----
> > Von: Doepfer_a100@yahoogroups.com
> > [mailto:Doepfer_a100@yahoogroups.com]Im Auftrag von deastman2
> > Gesendet: Donnerstag, 20. April 2006 07:31
> > An: Doepfer_a100@yahoogroups.com
> > Betreff: [Doepfer_a100] Re: A-154/dual A-155 combination false
> > triggering problem
> >
> >
> > Dieter,
> >
> > Just a gentle reminder ;)  I'm still experiencing this problem...
> >
> > Thanks,
> > David
> >
> >
> > --- In Doepfer_a100@yahoogroups.com, "deastman2" <deastman2@>
> > wrote:
> > >
> > > Dieter,
> > >
> > > If the A-155's are configured for standalone operation, they 
work
> > > correctly.  Also, if I put the A-154 in manual mode and clock 
the
> > > first A-155 with an LFO, there is no problem.  But if I use an 
LFO
> > as
> > > an Ext. Clock source for the A-154, the problem appears, just 
like
> > > using the internal clock.
> > >
> > > --- In Doepfer_a100@yahoogroups.com, "Dieter Doepfer" 
<hardware@>
> > > wrote:
> > > >
> > > > David,
> > > >
> > > > before we continue: does this problem occur only with the
> > > combination of
> > > > A-155 with A-154 ? Or does it occur even with a standalone A-
155.
> > > If the
> > > > A-155's have been modified earlier (for standalone mode) this
> > > modification
> > > > has to be cancelled (i.e. undo). Please refer to page 16 of 
the A-
> > > 154 manual
> > > > and the attached document.
> > > >
> > > > Best regards
> > > > Dieter Doepfer
> > > > Doepfer Musikelektronik GmbH
> > > > Email address: hardware@
> > > > Web Site: www.doepfer.com
> > > >
> > > >
> > > >
> > > > > -----Ursprüngliche Nachricht-----
> > > > > Von: Doepfer_a100@yahoogroups.com
> > > > > [mailto:Doepfer_a100@yahoogroups.com]Im Auftrag von 
deastman2
> > > > > Gesendet: Donnerstag, 6. April 2006 09:54
> > > > > An: Doepfer_a100@yahoogroups.com
> > > > > Betreff: [Doepfer_a100] A-154/dual A-155 combination false
> > > triggering
> > > > > problem
> > > > >
> > > > >
> > > > > I have an A-154 configured to control two A-155's.  I've
> > noticed
> > > that
> > > > > for Trigger Rows 1&2 for both A-155's, some steps seem to
> > generate
> > > > > one or more extra, erroneous trigger pulses.  I looked at 
the
> > > output
> > > > > on a scope, and I see the following:
> > > > >
> > > > > Steps 1 and 5 show the main trigger pulse, followed by three
> > very
> > > low-
> > > > > level pulses at the spots where steps 2, 3, and 5 would be.
> > > > >
> > > > > Steps 3 and 7 show the main trigger pulse, followed by one 
very
> > > low-
> > > > > level pulse at the spot where steps 4 and 8 would be.
> > > > >
> > > > > Steps 2, 4, 6, and 8 function normally.
> > > > >
> > > > > These extra pulses are strong enough to at least partially
> > > trigger an
> > > > > envelope generator controlling a VCA with an osc feeding 
into
> > it.
> > > > > For example, with all steps/rows on both sequencers in 
the 'off'
> > > > > position, except for row 1/step 1 on one seq, I get an 
envelope
> > > > > trigger at step one, followed by a lower-level trigger at 
step
> > 2
> > > (and
> > > > > in theory, it probably triggers again steps 3 and 5, if the
> > > envelope
> > > > > was set properly).  These extra pulses stay in sync when I
> > adjust
> > > the
> > > > > clock rate.
> > > > >
> > > > > I had this same problem when I first got the sequencers 
back in
> > > > > January, except at that time, row 3 also had the same 
problem.
> > > With
> > > > > only one A-155 connected to the A-154, there is no problem.
> > > Either A-
> > > > > 155 will function properly with the A-154, but once they are
> > > chained
> > > > > together, the problem appears.  I sent the A-154 back to
> > Analogue
> > > > > Haven for replacement, and the new one they sent me worked 
fine
> > > for a
> > > > > couple of months, until yesterday when this malfunction
> > > resurfaced.
> > > > >
> > > > > Other relevant information: The connecting cables were 
replaced
> > as
> > > > > well.  The sequencers are all powered by a single new PSU2.
> > Aside
> > > > > from the A-100, there is nothing else in close proximity 
which
> > > could
> > > > > be causing interference.
> > > > >
> > > > > I'm hoping there is a simple answer other than shipping back
> > more
> > > > > modules...
> > > > >
> > > > > Thanks,
> > > > > David
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > Yahoo! Groups Links
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > > [Non-text portions of this message have been removed]
> > > >
> > >
> >
> >
> >
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
>