Thanks Ingo,
This already helped me quite a lot.
I am definately not interested in the really resonant part of these filters.
But I do like the unpredictability of diode filters.
Using filters as VCO's is not really in my book. And using a keyboard
with a modular is rape in my opinion. Sorry, I'm weird like that.
But I still would not mind recordings. ;-)
Remember that I hardly take the resonance past 3 on my A102... I do
mostly have the level fully open though..
Thanks again Ingo,
Ernst
On 10/6/05, selfoscillate <
synaptic_music@...
> wrote:
> --- In
Doepfer_a100@yahoogroups.com
, achtung_999
> <heinrich.himmelwasser@g...> wrote:
> > Never mind Ingo, I'm really busy too this week..
> > No hurry..
> >
> > Greetings,
> >
> > Ernst
>
>
> hello ernst,
>
> unfortunately i'm still unable to record some
> ems/diode filter examples. i'm in the middle
> of a remix project, actually the modular is
> in heavy use and i cannot remove the patches
> until the recordings are finished. sorry.
>
> but maybe i can give a description of the
> differences between a102 and rs500e.
> both filters are weird in some ways.
>
> the quirks on both filters:
> increasing the resonance leads to a massive
> level drop of the input signal, the input signal
> starts to disappear almost completely. this can
> be worked out by increasing the level of the
> input signal, but this will also introduce
> distortion to the filtered signal.
> the resonance is frequency-dependent and the
> tracking is bad, both is not good if you want
> to use these filters as sine vco's or when
> exact key-tracking is required.
>
> thoughts about the a102:
> this is one of the most extreme filters.
> the input sensitivity is very high and
> the filter starts to oscillate with the
> resonance knob at 9 o'clock position.
> this means that approximately 60 percent of
> the knob range is outside the usual limits,
> leaving plenty of room for those
> supernasty overdriven sounds.
> the a102 has lots of bass when the resonance
> is set to zero. increasing the resonance
> somehow attenuates the low bass frequencies.
> the filter output can be very loud.
>
> thoughts about the rs500e:
> the signal input is still sensitive, but not
> as extreme as on the a102. the filter starts
> to oscillate with the resonance knob at
> 2 o'clock position. this is much more common
> than the knob scaling on the a102.
> to my ears the rs500e sounds warmer and rounder
> than the a102, and also a bit fatter with more
> bass when the resonance is turned up.
> on the other hand the rs500e cannot go into
> the same extreme territories like the a102.
>
> to some extent both filters share the same
> sound characteristics, but they are still
> different from each other.
> the rs500e offers a sound very similar to
> the original ems filter, while the a102
> sounds a bit harsher and more aggressive.
>
> it is also important to know about the tolerances
> of the diodes. the selection of almost identical
> diodes is a horror. you probably have to test a
> hundred diodes until you find one really matching
> pair of two diodes, and you need more than two for
> one filter. the result is that, due to the tolerances
> of the diodes, each filter has a slightly different
> sound. anyway this is a fact for many other filter
> designs too, so it is nothing to worry about.
>
> best wishes
>
> ingo
>
>
>
>
>
>
>
>
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