If you modulate the CV input of the VCF (which you placed after the
BBD) with an EG or envelope follower, it is possible to keep the
characteristic BBD sound for exactly the time desired, after which the
clock is slowly filtered out entirely in the time set by the "release"
control of the EG.
This way, you can use the VCF as a kind of 'noise'(clock) gate for
your bbd.

Hope this helps, regards
Joost


--- In Doepfer_a100@yahoogroups.com , "regimental1200"
<regimental1200@...> wrote:

>
> Regarding an LPF at the output of the BBD module, I've tried that,
> and exactly like you mentioned, you filter out too many of the
> goodies, so it's useless. It's just a matter of modifying DELAY
> CLOCK until it goes away.
>
> --- In Doepfer_a100@yahoogroups.com , "Adam-V" <adam-v@> wrote:
> >
> > Hi,
> >
> > You might need to expand on a the first problem little further.
> When
> > you say using an envelope as a clock source, presumably you are
> > modulating the HSVCO with an envelope, not clocking the BBD with an
> > envelope generator
> >
> > Regarding the high pitched noise, it sounds like you are describing
> > clock noise which is quite normal and does require a LPF to be
> placed
> > at the output of the BBD module in order to remove it. The obvious
> > drawback of this is the potential loss of high end audio
> frequencies.
> >
> > Cheers,
> > Adam-V
> > --- In Doepfer_a100@yahoogroups.com , "regimental1200"
> > <regimental1200@> wrote:
> > >
> > > I meant 4096 stages, not 2096
> > >
> > > --- In Doepfer_a100@yahoogroups.com , "regimental1200"
> > > <regimental1200@> wrote:
> > > >
> > > > I get a similar problem all the time!!!!
> > > >
> > > > Happens on a very intermittant basis. While using an envelope
> as
> > > > clock source, I smack a key and can get that typical repeating
> and
> > > > pitch shifting "Daaaaaaaa-daaaaaaaa-daaaa-da-da-da-da da"
> noise,
> > > and
> > > > then when it feels like it, it stops responding.
> > > >
> > > > Also, depending on how I have the delay clock knob position,
> I'll
> > > > get this extremely high resonant noise. Sometimes it's more
> > > subtle
> > > > like the frequency it's producing is so high that it's not in
> the
> > > > audible spectrum, but its enough to hurt my ears. I fear that
> > > I've
> > > > even damaged a bit of my high-end with this....
> > > >
> > > > Is this a defect in the unit, or is that the clock noise that
> the
> > > > manual talks about generally requiring an LPF And if it is,
> > > where
> > > > exactly should the LPF be inserted
> > > >
> > > >
> > > > --- In Doepfer_a100@yahoogroups.com , <hardware@> wrote:
> > > > >
> > > > > > Hi all,
> > > > > >
> > > > > > My tapped bbd module suddenly has a limited range, it can
> now
> > > > only
> > > > > > do short delaytimes, probably 25-40% of the range it
> should
> > > > have. In
> > > > > > other words: it can't produce the aliasing sound anymore.
> The
> > > > first
> > > > > > time I fired it up it was ok, second time it had this
> problem.
> > > > Any
> > > > > > ideas
> > > > > >
> > > > > > greetings, Anton
> > > > >
> > > > > Sounds like a fault. Probably the "heater" of the
> temperature
> > > > controlled
> > > > > logarithmic converter of the HSVCO is defective. If you are
> able
> > > > to replace
> > > > > an integrated circuit we can send you a new one. As all
> circuits
> > > > are
> > > > > equipped with sockets no soldering is required but only
> removing
> > > > the old
> > > > > circuit and inserting the new one.
> > > > >
> > > > > Please tell me your postal address (directly to me, not to
> the
> > > > Yahoo group)
> > > > > and we will send you the spare part if you agree. Otherwise
> > > please
> > > > send the
> > > > > module for repair.
> > > > >
> > > > > Best wishes
> > > > > Dieter Doepfer
> > > > > (hardware@)
> > > > >
> > > >
> > >
> >
>