MKS70

[Tony Hardie-Bick]

Actually, there's a bug in DFM1 that stops the cutoff going above 7kHz, & it's mathematical in nature; I at least need to fix this before moving on :)

Tony (HB)

"Marc Nostromo [M-.-n]" <marc.nostromo at gmail.com> wrote:

>+1
>
>2011/9/2 Jon Stutters <jstutters at jeremah.co.uk>
>
>> If it gets you coding your next filter then you should be locked in a
>room
>> with it I reckon ;).
>>
>> Jonny
>>
>> On 2 Sep 2011, at 14:24, Tony Hardie-Bick wrote:
>>
>> > Maybe I shouldn't read this ;)
>> >
>> > Chris Strellis <Chris.Strellis at crystalvision.tv> wrote:
>> >
>> >>> Anyway, James will have the pleasure of figuring it out :)
>> >>
>> >> Fo'sure :|
>> >>
>> >>>> http://www.strellis.com/rs3.shtml
>> >>>
>> >>> That MAM RS3 thing looks like a lesson in warmth... mad, man :)
>> >>
>> >> You'd like it ;)
>> >>
>> >> It's based on the Korg PS3100 triple resonator.
>> >>
>> >> http://www.korganalogue.net/korgps/manuals/3100/1/1RESO.html
>> >>
>> >>
>> >> and from
>> >>
>http://www.birthofasynth.com/Scott_Stites/Pages/triple_svvcf_main.html
>> >>
>> >> "The PS3100 resonator is made up of three independent bandpass
>filters.
>> >> The filters are arranged in parallel - i.e the input signal is
>applied
>> >> to the inputs of all three filters, and the outputs of all three
>> >> filters
>> >> are then mixed together to form the composite resonator response.
>> >>
>> >> The centre frequency of each bandpass filter is separately
>tuneable, so
>> >> that each filter can carve out its own section of the input
>signal. In
>> >> addition to that, all three filters can be moved in tandem by
>another
>> >> control, or control voltage, so that the centre frequency of each
>> >> filter
>> >> maintains the same relationship to the other two filters. Sweeping
>the
>> >> three filters in tandem is what gives the resonator its unique
>> >> character. Adjusting the relative position of each filter's centre
>> >> frequency changes the character of the initial response, and this
>> >> response is swept up and down in frequency. Sweeping the resonator
>in
>> >> tandem often, to me, sounds like a resonant phase shifter.
>> >>
>> >> In addition to being able to sweep all three filters in tandem,
>the
>> >> resonator also allowed one to adjust the resonance of all three
>filters
>> >> with one control, which provided yet even more variation to the
>effect.
>> >>
>> >> In later days, the resonator concept was expanded upon - one
>example is
>> >> the MaM RS3. The MaM RS3 allowed the filters to not only be swept
>in
>> >> tandem, but also independently of each other, to a large degree.
>In
>> >> other words, where the original resonator would only allow all
>three
>> >> filters to sweep up and down together, the MAM RS3 would allow two
>> >> filters to sweep up while another swept down, even at different
>rates.
>> >> This greatly increases the range of effects possible from a triple
>> >> resonant filter.
>> >>
>> >> Another innovation of the RS3 was the ability to provide a stereo
>> >> output
>> >> derived from the three swept filters."
>> >>
>> >> Maybe you want to model it ;)
>> >>
>> >> Cheers
>> >>
>> >> Chris
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>
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