Doepfer

hello anders,

the a149-1 generates a random event when you feed a gate signal
into one of the gate inputs, so it is completely up to
you, how often a random event will appear.
the random part of the a118 changes permanently,
so this is probably not what you want.

if you want to smooth the transitions over a very long period,
then you should consider the a170 dual slew limiter.
it doesn't have vc of slew time, but it has a switch for
the time base, just like the a140 adsr. with this you can
get transitions which evolve over several minutes.

i don't have information about the a117 here in the office,
i have to try it in the studio to be able to say more about it.

two additional notes:
the a149-1 only gives you positive values.
if you need them to be negative, then you need 
to add an a175 or a138c or a133.

when i need such very slowly evolving random voltages,
then i often use the combination lfo, slew limiter and
sample&hold. every time when i need a new value i simply
trigger the sample&hold. the actual lfo value is sampled
and then slewed by an a170. this solution gives both
positive and negative values.

best wishes

ingo



--- In Doepfer_a100@yahoogroups.com, "Anders Ehlin" 
<anders_ehlin@h...> wrote:
> Hello Ingo!
> 
> Yeah the 149 seems to be the most versatile, I'll check how much 
space I 
> have left, haven't ordered yet.. :-) But do you know how low 
density on the 
> signals you can derive from it, If I want to get changes in the 
area between 
> 30 secs and 1 minute or so..? And how does the 117 and 118 compare 
on this? 
> I can't find any info on this in the manuals, more than that the 
slew 
> limiter can smoothen a signal with up to 10 seconds.
> 
> Thanks a lot!/Anders
> 
> 
> >From: "selfoscillate" <synaptic_music@y...>
> >Reply-To: Doepfer_a100@yahoogroups.com
> >To: Doepfer_a100@yahoogroups.com
> >Subject: [Doepfer_a100] Re: random!!
> >Date: Wed, 25 Aug 2004 11:07:08 -0000
> >
> >
> >hello anders,
> >
> >the a117 digital noise module only outputs gate signals
> >with the same level, so it is mainly for triggering
> >other modules or for use as a noise source.
> >
> >the a118 gives smooth random voltages, but you can't control
> >the randomness via cv. this is a good application for
> >the a149-1, where randomness and the appearance of random
> >events can be controlled with voltages and gates, but the
> >voltage changes are not smooth, so you should add a
> >slew limiter here. a vc slew limiter gives even more
> >control over the smoothness of the random events.
> >
> >from my point of view the combination of a149-1 and
> >a171 is best, because it gives the most control.
> >
> >the a118 is an alternative, if you want to save money and
> >rack space.
> >
> >best wishes
> >
> >ingo
> >
> >
> >
> >
> >--- In Doepfer_a100@yahoogroups.com, "Anders Ehlin"
> ><anders_ehlin@h...> wrote:
> > >
> > > Hi guys!
> > >
> > > I can't descide what random module to go for, I aim at creating
> >long
> > > drones/soundscapes (mainly from incoming signals) that evolves 
very
> >slowly
> > > but "uncyclic", the random would for example triggering slow 
filter
> >events.
> > > I've looked at the 117 and 118 but the new contender 149-1 also
> >seems nice.
> > > Any suggestions? Should I get a slew limiter to soften the edges
> >even more?
> > >
> > > Thanks Anders
> > >
> > > 
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