hello tom,

yes, if you want to get rid of the clock noise, you
can simply patch a steep lowpass filter right after the bbd
and so you get a standard analog delay.
the problem is that the maximum delay time (and the possible
maximum frequency range of the signal) depends both on
the clock speed and the amount of stages in the bbd ic.
2048 stages won't give you long clean delays anyhow.
for example, with a delay time of 400 ms the clock noise
is very audible and the delayed signal has not much in
common with the original anymore. thats why analog delays
are more used for flanging or chorusing, where delay times
are much shorter. of course you can use it for longer delays,
but you have to decide if you want the delay unfiltered
(full of artifacts and clock noise) or externally filtered
(no or only minor clock noise, but a dull sound).
usual analog delays have such a filter built-in, these
units always have a dull sound with longer delays.
all a188/1 example recordings so far are unfiltered and you
can clearly hear those artifacts at slow clock speeds.
if artifacts are ok for you (i love them), then you
will surely have a lot of fun with the a188/1.

best wishes

ingo




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

>
> so, in your tests, would you say a reasonable analog delay is
> possible or would there need to be additional chips in the delay
> line and filters to filter the clock out
>
> i'm a lo-fi kind of guy, so the grease and noise of BBDs are not a
> deterrent but rather a plus.
>
> -t
>
> --- In Doepfer_a100@yahoogroups.com , "selfoscillate"
> <synaptic_music@y...> wrote:
> >
> >
> > hello tom,
> >
> > basically the only difference is the possible minimum/maximum
> > delay time. the bbd with 1024 stages offers shorter delays
> > than the 2048 stages version. i cannot say much about the
> > maximum delay time, because with long delay times you will
> > hear the clock noise and i assume that you don't
> > want this to happen with slapback delays.
> >
> > best wishes
> >
> > ingo
> >
> >
> >
> > --- In Doepfer_a100@yahoogroups.com , "thomasborax"
> <thomasborax@y...>
> > wrote:
> > >
> > > hello ingo and others-
> > > could you describe to me in more detail than is available on

the

> > > doepfer webpage what the differences, advantages and
> disadvantages
> > > would be between the two different bbd ics
> > >
> > > i prefer a longer delay time, as i would use a slapback and or
> > > reverb/delay effect more than i would use chorus.
> > >
> > > your sound files were helpful, thank you.
> > >
> > > ---tom
> > >
> > > --- In Doepfer_a100@yahoogroups.com , "selfoscillate"
> > > <synaptic_music@y...> wrote:
> > > >
> > > >
> > > > hello all,
> > > >
> > > > first, a merry christmas to everybody :-)
> > > >
> > > > the a188/1 is a very exciting module, especially
> > > > because it is not limited to standard flanger,
> > > > chorus or reverb effects.
> > > >
> > > > i have prepared some examples, recorded directly from the
> > > > output jack of the prototype (using a 1024 stages bbd ic).
> > > > sorry for the brief descriptions.
> > > > oh well, it's christmas... :-)
> > > >
> > > > 1.
> > > > karplus-strong synthesis, based on the example patch
> > > > as published on the doepfer homepage. this is an
> > > > example for plucked sounds.
> > > >
> > > > http://www.selfoscillate.de/a100files/a188-1-karplus-pluck.mp3
> > > > file size: 195 kb
> > > >
> > > > 2.
> > > > a single a110 sawtooth through the a188/1, delay time

modulated

> > > > by a triangle lfo.
> > > >
> > > > http://www.selfoscillate.de/a100files/a188-1-sawplus.mp3
> > > > file size: 210 kb
> > > >
> > > > 3.
> > > > a single a110 squarewave through the a188/1,
> > > > no delay time modulation, but obscure parameter values ;-)
> > > >
> > > > http://www.selfoscillate.de/a100files/a188-1-spooky.mp3
> > > > file size: 301 kb
> > > >
> > > > 4.
> > > > this is a self-oscillating a188/1, the module gets no
> > > > audio input. the delay time is modulated by an a149/1.
> > > >
> > > > http://www.selfoscillate.de/a100files/a188-1-selfplay.mp3
> > > > file size: 295 kb
> > > >
> > > > 5.
> > > > now my favorite. a drum pattern coming from a tr808
> > > > is fed into an a119 and from there into the a188/1.
> > > > the a119 env output is fed into the a188/1 cv in 2.
> > > > both delay time and cv 2 polarizer knobs were slowly
> > > > adjusted by hand during recording, to give an idea of
> > > > the sonic potential. in the beginning it sounds like
> > > > flanging, with decreasing clock frequency it falls into
> > > > a mixture of granular synthesis and bit-reduction.
> > > > the signal seems to fall apart and then rebuilds under
> > > > rhythmic control of the 808 signal level.
> > > > halfways through the recording the a188/1 audio input
> > > > attenuator is turned further clockwise for some
> > > > overdriven sounds.
> > > >
> > > > http://www.selfoscillate.de/a100files/a188-1-follow-the-

808.mp3

> > > > file size: 2110 kb
> > > >
> > > > have fun everybody :-)
> > > >
> > > > best wishes
> > > >
> > > > ingo
> > > >
> > >
> >
>