From JH. Sent Sat, Nov 24th 2007, 21:23
From JH. Sent Sat, Nov 24th 2007, 21:23
That will be a project of its own! http://home.debitel.net/user/jhaible/jh_string_filter.html I definitely plan to offer boards for that; but that's too big to be included in a filter _collection_! (Actually, my String Filter will have 40 bands, and will be on 2 or 3 PCBs.) JH. ----- Original Message ----- From: "Drew Neumann" <xxxx@xxxxxxxxx.xxx> To: "JH." <xxxxxxx@xxxxxxx.xxx> Cc: "analog heaven" <xxxxxxxx@xxxxxxxxx.xxx>; <xxxxx-xxx@xxxxxxx.xxxxxx.xx>; "MOTM List" <xxxx@xxxxxxxxxxx.xxx> Sent: Saturday, November 24, 2007 8:54 PM Subject: Re: [AH] Famous Fixed Filters - FFF PCB ? Moog String Filter On Nov 24, 2007, at 10:47 AM, JH. wrote: > Hi - I've been thinking about PCB projects for 2008. > > What dou you think about a collection of "Famous Fixed Filters"? > > I think fixed filters are much underrated. Sure, the first thing you > need in > a synthesizer, is a variable filter - a VCF. Several VCFs, actually. > The > next step are fixed filters like filter banks, graphic and parametric > equalizers, for formant shaping. > But then there are the "preset filters" that have been optimized in > ensemble > keyboards, electronic organs, the Polymoog, the Vocoder Plus, you name > it. > These filters can be emulated with parametric EQs to a certain degree, > but > it would still be nice to have the original filter, in dedicated > hardware, > with all their complexity, all their special overload behaviour, all > their > character. > > But there's a problem: > A few years a go I built a rackmount FX to emulate the Human Voice > filters > of the Roland Vocoder Plus VP330. > This is an example for such a filter - but IMO it's not worth to make a > dedicated module for this. It's a waste of front panel space to make a > dedicated module for such a small filter circuit. > > So I had the idea to combine many such fixed filters in one module. > > Right now I try to find out how many "famous" fixed filters I can put > on a > single 160mm x 100mm PCB - and which filters are your favorites. > > The Polymoog comes to mind. > All kinds of Formant filters in electronic organs. > A "manual" filter like the SH-5 BPF. > ... > Anything that needs a minimum of front panel controls and has a lot of > character. > > Let me know what filter you would like to see included. > And if you're interested in such a PCB at all. > > The idea is to offer a board for 27.00 Euro with all the filters on > it, and > then allow various configurations: > > (1) Each filter may have its dedicated input and output jack. > > (2) You have one general input and output, and a set of switches, or a > rotary switch, to choose your favorite fixed filter. > > (3) You could also connect potentiometers to each filter output and > mix them > all together. > > (4) You could have normalized input and output jacks, to use certain > filters > separately, and still mix some of the others together. > > (5) You could feed different waveforms into dedicated filter inputs, > and > then mix the outputs. > > (6) or any other combination that comes to mind. > > Let me know what you think about this idea. > > Would you buy such a board? > What classic filters would you consider mandatory in such a collection? > > Looking forward to hear from you! > > JH. >