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softegg · Post by **softegg** » Sun May 17, 2009 5:54 pm

Hi,
whenever I try emus of ARP Odysses I am amazed by the possibilities that the duophonic playmode offers. ( especially together with RM and portamento.) I would love to have something like that in a modern synth. In filterscape VA that would be quite straight forward, for zebra i would suggest having a duo mode where everything in columns 1/2 of the grid reacts to the lower note, everything in 3/4 to the higher one. Imagine the super playable patches you could do with such a setup! I hope you like the idea. cheers,

Urs · Post by **Urs** » Sun May 17, 2009 7:09 pm

I've been thinking about this for a long time, but never really got into it... mostly because I've never had/used a duophonic synth. How's the GMedia one?

How would it actually work? Does a single key play all oscillators tuned to that one, and when you press a second key, the second oscillator gets detuned?

I guess I really need to test this...

thelizard · Post by **thelizard** » Sun May 17, 2009 7:41 pm

If I understand the concept correctly, you can do this in Kore. You can set up keymaps, where certain sections of the keyboard play different patches, and you can set-up as many as you want. There are probably other hosts that will do this.

Cyoon · Post by **Cyoon** » Sun May 17, 2009 8:26 pm

So you mean complete other patches? like the multimode on the Virus Ti, thats a really cool feature indeed..but i gues then , one instance of zebra has to be able to receive notes on the 16 diff midi channels in a way..so that you can split one octave of the keyboardon channel one with a certain patch the second octave on channel two, with another patch..and so on..

something like that maybe?

softegg · Post by **softegg** » Sun May 17, 2009 9:51 pm

the concept in the arps is that when only one note is pressed both oscillators play this note, when two notes are pressed osc1 plays the lower one osc2 the higher one. the cool thing about that is that osc 1 can ringmod osc2, so you can get really interesting sounds. the link between subsequent notes is exactly like in the already existing legato mode.

the reason why i think this would be cool in zebra is that it woud allow for things like playing an fmo with one key and the osc that feeds it with the other one ( just one example ). or imagine what you could do with the comb modules !!! i think this woud be a really unique and extremely powerful performance tool.

PaulSC · Post by **PaulSC** » Sun May 17, 2009 9:57 pm

How would triggering of modulators work? For instance, suppose Env3 modulates parameters of audio modules in columns 2 and 3.

softegg · Post by **softegg** » Sun May 17, 2009 11:09 pm

like in legato mode.

PaulSC · Post by **PaulSC** » Sun May 17, 2009 11:29 pm

Okay that makes sense.

thelizard · Post by **thelizard** » Sun May 17, 2009 11:43 pm

softegg wrote:the concept in the arps is that when only one note is pressed both oscillators play this note, when two notes are pressed osc1 plays the lower one osc2 the higher one. the cool thing about that is that osc 1 can ringmod osc2, so you can get really interesting sounds. the link between subsequent notes is exactly like in the already existing legato mode.

Ahhh, now I see. Yeah, that'd be cool. In Kore, you could have each keymapped patch playing different arps, but having them modulate each other is a different can of worms. Perhaps you could send both of them into the same instance of Zebrify and mix/modulate them from there?

Urs · Post by **Urs** » Mon May 18, 2009 7:34 am

So, let's sum up the whole logic as far as I understand it:

- duophonic works like legato
- a voice is triggered only for the first key pressed
- a voice is released after all keys are lifted
- osc 1 plays in tune of the lowest key pressed
- osc 2 plays in tune of the highest key pressed
- transitions in osc tune happen at glide/portamento rate independent of voice start

Is that correct?

-> I think this would be a quite easy rule to implement. I could certainly think of that...

softegg · Post by **softegg** » Mon May 18, 2009 11:36 am

exactly right!

in the case of zebra i would suggest to put it like this :

- duophonic works like legato
- a voice is triggered only for the first key pressed
- a voice is released after all keys are lifted
- everything in the columns 1/2 of the grid plays in tune of the lowest key pressed.
- everything in the columns 3/4 of the grid plays in tune of the highest key pressed.
- transitions in osc tune happen at glide/portamento rate independent of voice start

The prospect of having such a thing makes me very happy! thanks urs!

MitchK1989 · Post by **MitchK1989** » Tue May 19, 2009 2:00 am

That actually sounds like a great way to implement it, and even better in zebra than in oddity with the amount of FM, filter FM, ring mod, etc. that can happen in zebra.

I was actually tempted to buy oddity basically just for the cool duophonic ring mod and FM patches you can do, but now I think I'll hold off for a bit perhaps since other than those patches I wasn't terribly fond of the basic sound character.

Mark Landman · Post by **Mark Landman** » Tue May 19, 2009 4:55 pm

softegg wrote:exactly right!

in the case of zebra i would suggest to put it like this :

- duophonic works like legato
- a voice is triggered only for the first key pressed
- a voice is released after all keys are lifted
- everything in the columns 1/2 of the grid plays in tune of the lowest key pressed.
- everything in the columns 3/4 of the grid plays in tune of the highest key pressed.
- transitions in osc tune happen at glide/portamento rate independent of voice start

The prospect of having such a thing makes me very happy! thanks urs!

This is perfect, but I'd enjoy seeing the old "interval lock" from the old Arp duophonic 2600 keyboard added as well if possible.

Basically it just allows you to play a 2 note "chord", and "lock" it by depressing a switch, sending a midi command, whatever. Once it's locked, playing a single note sends the root note to the first set of oscillators and the top note to the second set of oscillators automatically as you play single note lines on the keyboard.

The idea was to let the player quickly play those unison with fourth or fifth lines quickly without having to retune the second oscillator. But it was much more useful when using osc. 2 (the osc. controlled by the duophonic upper voltage) to audio rate modulate the filter, as each different keyboard interval gave a different distortion effect.

Given all the nice sidebands, ring mods, XMF's, and other fun sidechaining modules in Zebra, this could be a really great addition!

MitchK1989 · Post by **MitchK1989** » Tue May 19, 2009 10:12 pm

that interval lock thing sounds like chord memory, only chord memory works with more than 2 voices rather than just one if you want to.

u-he

KVR Audio

FR : duophonic playmode in zebra and filterscape