Doepfer

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]
> >
>