putting 3 different filters in a box

[birt]

what is the most interesting feature? right now i've got a pre/post switch for the first 2 filters in my schematic. or would a parallel/series switch for all 3 be more interesting for vocal like whacky sounds?

[Mark Hammer]

Need more info.  What's in the box?  Waht sort of filters?

[christian]

3 bandpass filters in parallel, all modulated differently

ch.

[Quackzed]

 
cool! like a drunk univibe... lol
are all 3 filters in paralell or just the first 2? due to the pre/post switch? i'd want all 3 parallel and have a switch for 1 (the slowest/widest bandwith filter) to be in series post filters... if i have it straight in my head that would be like  3 crisscrossing filters(parallel) or 2 crisscrossing filters into the last filter for slow sweep of crisscrossing filters, all 3 in series might be pretty thin at times ... aw hell, put a series parallel on each filter!! you know you're gonna want to hear all the variations!!! 
maybee you could post some clips.. i like the sound of that! i'd like to hear it with some heavy fuzz in front!!

[birt]

well its a filter i took from the gargler, a colorsound inductorless and a nurse quacky. all modulated differently (well they all have different modulation options, there's a little patch bay with 2 different pots, an LDR, an envelope and an LFO. they all have their own stomp switch and if a filter is connected to the pot inside the rocker switch, it goes on as soon as i move the rocker)

i made a schematic of all three in parallel with the first two (colorsound and quacky) on a pre/post switch. but i was thinking maybe a series/parallel switch might be more interesting. i need opionions right now


i have the schematic on a huge paper and now i'm drawing it on the computer

[christian]

but i was thinking maybe a series/parallel switch might be more interesting. i need opionions right now

If they are bandpass filters (apparently? wahwahs?) , you wouldnt like to put them in series, cause theyd be just canceling each other if their frequencies are set different, one would cut what the other passes through.

Put them in parallel, its how Talking Box did it. And also vocoders and formant filters (altough slightly different idea, but parallel bandpass filters anyway..)

ch.

[birt]

so basicly i just put all of them parallel? then i can just remove the pre/post or parallel/series switches.

and then i can put a phase switch on one of the wahs. somebody got a schematic for that?

[christian]

and then i can put a phase switch on one of the wahs. somebody got a schematic for that?

Geofex has a schematic. Search for "Polarity Reversing Circuit".

ch.

[birt]

and then i can put a phase switch on one of the wahs. somebody got a schematic for that?

Geofex has a schematic. Search for "Polarity Reversing Circuit".

ch.

i just found that and also found that it was used in the ROG splitter-blend with the component values indicated. but the ROG version has an input buffer in front. i wonder if i really need that input buffer?

[christian]

i just found that and also found that it was used in the ROG splitter-blend with the component values indicated. but the ROG version has an input buffer in front. i wonder if i really need that input buffer?

Depends on the output impedance of the circuit before that. You can raise the input impedance of the switcher by increasing the resistors to larger value.
You can always use a simple FET buffer too, if you dont like to have lotta opamps, but dual opamp gives you polarity switcher and buffer.

ch.