[sdiy] help finding roland filter schematics?

[Dan Snazelle]

great advice and the answer is yes.

in the last 2 weeks i have built over 15 filters on the breadboard.

it has been very educational and at times aggravating as some of them go off without any problems at all and some i just can not get working right.


AND THIS IS WHY i am trying to intuitively understand more about how the circuits are working. i have read the ENS76 filter article, reading the filter cookbook by lancaster, going through chamberlins book, and also barry kleins....

and today i am watching aarron lantermans lectures on ota FILTERS

so i am trying to on the one hand learn by DOING and also, learn by reading and watching...two different modes for me and right now until my math gets better,there is a ton about filters i just dont GET.

i keep coming back to roland because they have a lot of schematics that if all you need to do is replace their ota chips with the ones we have now...well that is a lot of circuits to learn from, mess about with,etc


and ray wilsons soundlab filter and sub commander are also 2 great starting circuits.

i like them better than the datasheets because there are notes on what is happening in the circuit!!

i do keep finding though that no matter what circuit i build, i keep wanting to change the original values.

my wife keeps telling me to stop...she thinks i am suddenly going a bit nuts over filters!!

thanks

--------------------------------------------
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AUDIO ARK:

www.youtube.com/watch?v=TJRpvaOcUic

www.youtube.com/watch?v=BqIa_lXQNTA&feature=channel_page

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----------------------------------------
> From: okvern at ix.netcom.com
> To: synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] help finding roland filter schematics?
> Date: Wed, 29 Apr 2009 09:46:31 -0700
>
> Dan Snazelle wrote: "in my quest to better understand OTA filters...."
>
> I don't know about Roland filters (maybe I should change the subject line?),
> but I've been following your questions about OTA filters, and it sounds very
> similar to my experience. I've been wondering--have you built the examples
> shown in the datasheet/application notes for the LM13700? I found it
> incredibly helpful to get those examples working before I moved on to more
> complex circuits. Building the circuits without voltage controlled
> resonance, for example, would probably help isolate the problems you were
> having with that feature. Then I'd look at the excellent--but relatively
> simple--SEM-style circuits from MFOS and Takeda-san.
>
> Just a thought--this approach helped me a lot when I was learning OTA
> filters.
>
> Thanks,
>
> Ole
>
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