[sdiy] Oberheim Xpander VCF

[cheater cheater]

There are so many possibilities you could write a paper on that topic.

:^)

D.

On Thu, Jan 15, 2009 at 4:15 PM, David Moylan <dave at westphila.net> wrote:
> Cool plots.  Do you have info on the mixing which causes these responses?
>
> Dave
>
> Andrew Simper wrote:
>>
>> And you can get many more responses than the ones in the oberheim xpander
>> service manual, one of my favorites is -12 st Notch, 0 st Resonant peak, +12
>> st Notch called N2P2N2T (T for twin or tripple in this case)
>>
>> Here are some plots:
>> http://www.vellocet.com/dsp/CascadedFilterResponses/
>>
>> Andy
>>
>> Antti Huovilainen wrote:
>>>
>>> On Thu, 15 Jan 2009, George Hearn wrote:
>>>
>>>> I've been pointed in the direction of the Oberheim XPander VCF.  I think
>>>> it's quite incredible how 16 filter modes can come out of one filter.
>>>>  Does
>>>> this not make it about the most versatile analogue filter design ever?
>>>
>>> You can get the same modes (and over a dozen more) from any 4 pole
>>> cascaded RC style filter (Moog ladder, CEM, OTA etc).
>>>
>>> Antti
>>>
>>> "No boom today. Boom tomorrow. There's always a boom tomorrow"
>>>  -- Lt. Cmdr. Ivanova
>>> _______________________________________________
>>> Synth-diy mailing list
>>> Synth-diy at dropmix.xs4all.nl
>>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>