hello! so I am working on a couple of modules involving the CEM3320 in various orientations. have people had experience with this? I have with the gameboy mega machine, with the Elka Synthex filter. It was good but just seemed a bit big and bulk of a design.
(im getting back to the gameboy megamachine very soon)
To make it simple im thinking of making a dual filter with a 4 pole (maybe a 4/2pole switch) high pass going into a 4 pole (maybe the switch again) low pass.
same size as the 1113 filter.
I have another filter im working on atm with them but that ones gunna be a silly big one more info to come!
Being able to use them in series and/or in parallel is a really nice feature you might consider. One of my synths has this feature and it allows to mix / blend the outputs of the filters as well (also/even if they are in series). This makes it possible to fade from one transfer function to the other. Sounds great !
This is what I meant. I thought a diagram will make things more clear.
Below you see a state variable filter (SVF) and a ladder filter (LAD) in 2 configurations. They each have their own controls, but I’ve left those out here because I wanted to emphasize the signal flow.
The filters can be used in parallel mode or in series mode.
Note that in series mode you stil/also have access to the output of the 1st filter in the series it gives one the possibility to mix in the output of the SVF, but you can run it in true series mode as well.
Obviously you can use this configuration with a low pass and a high pass filter as well.
