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@)
> > >
> >
>