Doepfer

speaking of res loops (rs120)..
i was playing around w the res loop on an AS rs110 last night 
when suddenly a patch i made caused the audio to go away and 
not come back by undoing the patch.  i patched an a140 output to 
the resonance loop's input (nothing connected to res loop's 
output.)  and 'blip', out goes the signal.  i thought i had a bad 
cable or jack, traced the signal problem to the filter, it had 
stopped passing audio, was 'locked up'.  that is, until i wiggled 
the freq knob on the rs110, then the sound came back w a 
screech.  i assume the filter went into self-oscillation at an 
inaudible freq when i plugged in the a140.  anybody know if is 
this harmful?  either way, anybody know more about possibly 
harmful patches?  
i'm generally a plug-anything-to-anything experimentor but this 
has me wondering if it's possible to abuse a circuit to death.  
-duff

That's interesting.  I have a "factory"-assembled Blacet Final Filtre
that occasionally gets effed up and quiet and behaves oddly, but returns
to normal functioning after being turned off for awhile.  Not sure what
causes that behavior either.  In that case, though, I suspect some kind
of actual flaw in the circuit or a bad part.

> -----Original Message-----
> From: duffnuff [mailto:duffnuff@hotmail.com] 
> Sent: Tuesday, August 20, 2002 11:59 AM
> To: Doepfer_a100@yahoogroups.com
> Subject: [Doepfer_a100] stuck filter
> 
> 
> speaking of res loops (rs120)..
> i was playing around w the res loop on an AS rs110 last night 
> when suddenly a patch i made caused the audio to go away and 
> not come back by undoing the patch.  i patched an a140 output to 
> the resonance loop's input (nothing connected to res loop's 
> output.)  and 'blip', out goes the signal.  i thought i had a bad 
> cable or jack, traced the signal problem to the filter, it had 
> stopped passing audio, was 'locked up'.  that is, until i wiggled 
> the freq knob on the rs110, then the sound came back w a 
> screech.  i assume the filter went into self-oscillation at an 
> inaudible freq when i plugged in the a140.  anybody know if is 
> this harmful?  either way, anybody know more about possibly 
> harmful patches?  
> i'm generally a plug-anything-to-anything experimentor but this 
> has me wondering if it's possible to abuse a circuit to death.  
> -duff
> 
> 
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Hi duffnuff 

> screech.  i assume the filter went into self-oscillation at an
> inaudible freq when i plugged in the a140.  
Yes this may happen. The A121 has a capacitor which prevents this
selfresonace at inaudible high frequencies. But on the other hand this
capacitor causes the Highpassfilter to be something more like a kind of
Bandpass with 12dB/Oct at the "lower side" and 6dB/Oct on the "upper side"
at 5 or 6 octaves higher Frequency.

> anybody know if is this harmful?  
No.

> either way, anybody know more about possibly harmful patches?
Yes there are: Have a look at these adapters:
http://www.fiftythree.org/etherkiller/


Florian
-- 
Florian Anwander                  |ConSol*  HP-Support
Tel.   +49.89.45841-133           |Consulting&Solutions Software GmbH
Fax    +49.89.45841-139           |Franziskanerstr. 38, D-81669 München
email: florian.anwander@consol.de |http://www.consol.de

either way, anybody know more about possibly 
> harmful patches?  
> i'm generally a plug-anything-to-anything experimentor but this 
> has me wondering if it's possible to abuse a circuit to death.  
> -duff

I once asked Dieter about it and he replied that all modules has a 
short-circuit protection build in so it shouln´t be possible to 
destroy modules - Doepfer modules anyway. :-)

Keld

> Yes there are: Have a look at these adapters:
> http://www.fiftythree.org/etherkiller/

florian,
nice adaptors!
speaking of....just loaded an .aif (282k) to file section.  
-duff

Florian,  that is sick and twisted.... i like it
but it is still sick.



--- Florian Anwander <Florian.Anwander@consol.de>
wrote:
> Hi duffnuff 
> 
> > screech.  i assume the filter went into
> self-oscillation at an
> > inaudible freq when i plugged in the a140.  
> Yes this may happen. The A121 has a capacitor which
> prevents this
> selfresonace at inaudible high frequencies. But on
> the other hand this
> capacitor causes the Highpassfilter to be something
> more like a kind of
> Bandpass with 12dB/Oct at the "lower side" and
> 6dB/Oct on the "upper side"
> at 5 or 6 octaves higher Frequency.
> 
> > anybody know if is this harmful?  
> No.
> 
> > either way, anybody know more about possibly
> harmful patches?
> Yes there are: Have a look at these adapters:
> http://www.fiftythree.org/etherkiller/
> 
> 
> Florian
> -- 
> Florian Anwander                  |ConSol* 
> HP-Support
> Tel.   +49.89.45841-133          
> |Consulting&Solutions Software GmbH
> Fax    +49.89.45841-139           |Franziskanerstr.
> 38, D-81669 M�nchen
> email: florian.anwander@consol.de
> |http://www.consol.de
> 


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I just want to say that I really love the sound of the rs120 multimode.  
Very warm.

But far as the RES loop, about the only thing I've done is put the 
notch out into it and it gives a brighter results.  Bob told me they 
added the res in/out by just tweeking the circuit and found these two 
modes that seemed interesting and added it to the faceplate.

Can anyone give me some great examples of the use of the res loop?  I 
am really curious.

thanks in advance,

P

> Can anyone give me some great examples of the use of the 
res loop?  I 
> am really curious.
> 
> thanks in advance,
> 
> P

i think that's the rs110 you're referring to as multimode (not 
rs120), anyway.  yes, i agree.  it is a most warm, pleasant 
sounding filter.  
as for the res loop, i really enjoy patching a spring reverb into it 
(res out -> reverb in, reverb out-> res in).  but more so, a roland 
space echo (via a181), i'm sure any delay would do.  also, for 
timberal shifting, patching a fully animated a136 (w slow lfo 
controlling +L and -L) adds a wonderfully thin layer of overdrive 
and misbehaviour, also a124 wasp is interesting in the 
misbehaviour dept.  
basically, sound processors work great  in the res loop and are 
generally subtle, even w an otherwise heavy-handed processor 
patched in.  no luck w cv processors.  (that's how i temporarily 
rendered mine silent)  

-duff