Doepfer

well, the dull squishy repeats of analog delays are their appeal for 
sure, imo. i wondered about delay capabilities simply because it 
seemed geared more towards the very short delay times.

even if it doesn't do nice regular stompbox type analog delay, i 
will still get this becuase it is affordably priced and seems really 
wacky and lo-fi cool.  i am a BBD freak.

___ToM

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