hmm… new topic catogory weee ! ![]()
Just nothing that ive got some of the peliminary hardwardware built to start experimenting with making a self contained, Filter bank Controlled by the usual CV modules …however also integrating signal switching/routing to facilitate full automation and recall of setups.
The intention of this project is to create a modular system; which pretty much any combination of filters and other cv compatable hardware can be dropped directly into the rack case… And be selected for hooking into a pc as a ‘Hardware Plugin’ ..by using a multichannel soundcard in duplex mode to send sound out for processing & capture the result at the same time. an equal number of ins and outs would be nice ie 16in/16out.. 8in/8out.. even 2in/2out… if the budget wont strech far enough !
(infact, theres no reason for that matter, why this couldnt be used to build a complete stand alone modular analog synth with full routhing and automation too.. just a choice of modules)
Currently Have built one of the CV modules; fully working (+ oled display
) …with another to finish …see shabby cam pic below:
And am in the process of finishing building afew analog filters… Everything will be mounted into a temporary case whilst all the really tedious tinkering happens..
Not on a mad rush with this one, quite yet (need to learn some rudimentry code for hacking mios for one) …so dont expect results too soon…
Tho any input and discussion on the matter is welcome..
Things that need defining and refining to make this work properly (as well as prove useful for other projects).. Are tracking down appropriate parts to make affordable Signal switchers (absolutely mandatory!) & also a viable way to multiplex CV channels ..or at least make CV channels cheap somehow ! (some of this discussed elsewhere..)
As a side issue, may need to use transconductance opamps to CV’ify various (filter, etc) controls which where not setup for this originally. …other option of using digitally contrrolled resistors (PGA chips) probably wont work in most instances… introduce artifacts & further complicate the hardware involved. …reasoning to the contuary welcome of course ![]()
The idea being to avoid the need to manually set anything (front pannel should be a collation of blinking lights at the most
…realtime control can be done through a Midi control surface if it is needed ![]()
Anyways thats all for now.
UPDATE:
Current INITIAL panel design… with some further refinements and explaination to come …have started moddding the case already ..btw this is a smoked perspex bonanza ![]()
(Raised front bezel comes forward by 1/2 inch - Case from Scrap Recycled, HP Infered Laser source/psu)
Scematic of internal workings,
eight channels of audio in and out (provided by a maudio 1010lt), filters/cv controllable analog thingys grouped togeather in (8) banks of 4. only one ‘filter’ selectable per an audio channel, two cvs & hard wired trigger can be used where nessusary (ie when installing a VCO).
An audio/router is needed to juggle signals around as illistrated, per a bank this will require (in and out) switching of 4 channels between 4 destinations (‘filters’)
Suggestions on practical solutions here are welcome …got some ideas already ![]()
oh, and the led panel is connected upto the CV & Trigger sources to indicate status.. along with audio in and out levels for the 8 i/o chains.. with the assistance of a vu chip per a bunch of leds (signal indiction below their range provided by plain led)) …oh and of course indication of which ‘filter’ is slected needs to be tapped off from the appropriate place.
right thats all for now..