Thank you Ingo. You're defenitely right about the need of 2x 106.
I hadn't noticed that there's a 2nd cutoff and peak/reso for the HP on the original.

You're a great help...thanks again.

--- In Doepfer_a100@yahoogroups.com , "selfoscillate" <synaptic_music@...> wrote:
>
>
> > Thanks Ingo especially for the tip regarding the A170.
> > Do I need 2 of the xtreme filter I thought that the module contains
> > a LP and HP in one
>
> i'm afraid that you really need two xtreme filters to replicate
> the filter section of the ms20. the ms20 has independent filters
> for lowpass and highpass, which means that they can have different
> cutoff frequency and different resonance, so you will get two
> different resonant peaks in the spectrum at the same time and
> you can form a bandpass with variable width. all this is not
> possible with only one xtreme filter.
> also there is the sy02 filter available from analogue solutions,
> which is a module with independent filters for high- and lowpass
> and a final vca. it is not as versatile as two a106/1, but
> it still is a good deal, especially when thinking about the
> low british pound. in my opinion two a106/1 sound better than
> one sy02, but that is a matter of taste.
>
> > Is there a way to shift/to offset a voltage in positive range or
> > negative range only I'm thinking to have (i.e. LFO/ADSR) a
> > positive range (no inversion).
>
> there are several ways to shift a bipolar voltage
> (f.e. from an lfo) into positive or negative range only.
> you could do that with an a138c polarizing mixer (which also has
> an offset function on the first channel) or the new a183-2
> offset/polarizer module.
>
> best wishes
>
> ingo
>