Is there any module that offers polyphony ? or just through melodic chords that some modules offer?
Well, yes/no/maybe. 'Quad', in the module database, refers to modules that have four identical (more or less) functions, as a rule. There's a few things that actually are four-channel devices...but not many. Now, as to the yes/no/maybe part...let's say you have a quad VCO, such as Doepfer's latest unit. You could then feed each VCO into each filter on a quad VCF, like Qu-bits, and so on. But that wouldn't quite fit the bill of the reason for having modular, which is to take advantage of the open architecture to construct your own instrumental paths.
Example: with two quad VCOs, then you have two VCOs per voice, which you can deploy as 1-1-1-1 / 1-1-1-1 OR 2-2 / 2-2. More quad filters means more possible timbral combinations. So, yes...quad tends to refer to modules that 'play nice' in a 4-voice polyphonic environment and are convenient for that sort of architecture, but by no means do you have to use them as discrete voice components. It's just handier to patch polyphonically with them.
I appreciate your clear feedback Lugia!
That means, that Braids for ex. ,since it's not a quad Vco, cannot deliver polyphonic notes? by itself...or i would need a multiplier of some sort ( total newb :) )
Braids, in addition to being discontinued and replaced by Plaits, is only a single signal source. What you need to look for is how many incoming oscillator CVs you see. Braids has only the single 1V/8va CV input, ergo it can only respond to a single incoming pitch value at any time. Contrast this with something like Flame's 4VOX, where you clearly see four separate, distinct VCOs. Now, on those, you DO see two CV inputs...but when you see something like that on something that's clearly a single source, it means that one of the CV inputs is for the 1V/8va pitch control CV, and the other one is actually for incoming modulation signals, such as from an LFO. And even moreso with the 4VOX, you have another CV input that's clearly labelled "PITCH"...so in its case, the 1V/8va signal definitely goes there. But...you could also send that to the CV1 or CV2 inputs and then use the attenuators for each to change the pitch response to something other than the usual 1V/8va, resulting in microtonal intervals.
Perhaps a clearer example would be Studio Electronics' QUADNIC...on that, you clearly see each of the four "1V/O" CV inputs for pitch control of the module's four digital VCOs, and the individual outputs for each one along with a mixed output of all, and a bussed-to-all modulation input. This is the sort of thing you want IF you opt to use quad-type modules which, granted, tend to save a bit over using single discrete modules both in terms of space and money.