u-he

zethus909 · Post by **zethus909** » Mon Apr 11, 2016 8:38 am

Ive been wondering this for a while intermittently, but i couldnt understand why the default position on oscillators was in the middle.......but i think i understand now.........its in the middle because that is the 0 degrees phase right? i usually end up turning it all the way to the left on like kick patches.....because it started to seem like leaving the osc in the default middle position would kill the initial transient....
but then from new understanding of waves, it would make sense the the middle was the default.....
the value for the middle is 50.....with zero being totally to the left...so

it doesnt say in the manual so i was just wondering

and i was also wondering if anyone has graphic representations of the FMOs like what does the double sine mean...like what does it look like......and dual AM sine...i'm looking online...like it would be helpful to see them so you could see where the phases are etc....because you cant change FMO phases...right? so i was think that maybe you made the FMOs have different phases like the waveform sine shift? like how much is it shifted by etc....haha

thanks

NerdMcBoon · Post by **NerdMcBoon** » Mon Apr 11, 2016 9:03 am

The phase knob is in the middle because it makes the most sense when using the feature that adds an inverted version of the waveform (I can't remember the name at the moment), as it will give you a perfect square when using a saw wave.

If I remember correctly, the default position for the phase knob used to be 0 in earlier versions of Zebra, by the way.

The additional waveforms of the FMOs are from the Yamaha TX81Z.
Here is a pretty picture of the waveforms:

Regarding phase in general: You shouldn't get too technical about it. Just try different settings and see what works best for you. It never hurts to have an understanding of the technical mechanics behind stuff, of course.

zethus909 · Post by **zethus909** » Mon Apr 11, 2016 12:32 pm

ok thanks, quadric shift and sine shift are like half the cycle...which means that there is no voltage change for half the cycle?...why? what are the implications...i just looked at them all on oscilloscope.

so these are not the same as tx81z............

david.beholder · Post by **david.beholder** » Tue Apr 12, 2016 7:20 pm

NerdMcBoon wrote: Regarding phase in general: You shouldn't get too technical about it. Just try different settings and see what works best for you. It never hurts to have an understanding of the technical mechanics behind stuff, of course.

Zebra is nerd synth. It's exactly about being technical and too technical

Guys who don't want to be technical are using Hive.

BDeep · Post by **BDeep** » Tue Apr 12, 2016 8:06 pm

david.beholder wrote:
NerdMcBoon wrote: Regarding phase in general: You shouldn't get too technical about it. Just try different settings and see what works best for you. It never hurts to have an understanding of the technical mechanics behind stuff, of course.
Diva is nerd synth. It's exactly about being technical and too technical Guys who don't want to be technical are using Hive.

Zebra?

david.beholder · Post by **david.beholder** » Tue Apr 12, 2016 8:09 pm

BDeep wrote:Zebra?

Thanks. Fixed.

zethus909 · Post by **zethus909** » Wed Apr 13, 2016 4:41 am

david.beholder wrote:
BDeep wrote:Zebra?

Thanks. Fixed.

Oscilloscopes show changes in Voltage over time. The greater the change in voltage, the greater the change in electrical current (the more charge carriers) there are passing over a fixed amount of time...

...you have these two waves...sine shift and quadric shift...they both have half the cycle showing no change in voltage over their last half...or during 180 to 360 degrees of the full cycle

so what does that mean...in terms of oscillators in Zebra...doesnt that mean that at very low Hz like at minimum on the FMOs that there is effectively no oscillator during the last half of the cycle...so if you are using FM at LFO levels....as the carrier...you will have silence coming from the oscillator during the last half of the cycle.. so for 500 ms their is effectively no carrier signal...'

BDeep · Post by **BDeep** » Wed Apr 13, 2016 8:22 am

There is a carrier signal, but it's zero (big difference).
Now usually you wouldn't use them at frequencies that are so low that there would be an audible silence. In fact, with frequencies like that, the non-zero part of the wave wouldn't be audible as well.
The fact that you cycle the wave in an audible frequency makes for interesting timbres.

The phase may be important for the transient phase of a bass sound for instance. Or, when you FM one osc with the other, the resulting wave of the two combined waves may be different depending on the phase shift.

Also, in some cases the difference is obvious, in other cases hardly discernible.

zethus909 · Post by **zethus909** » Thu Apr 14, 2016 5:07 pm

so is the phase at 0degrees when the knob is in the middle default position? or is it at 180degrees

zethus909 · Post by **zethus909** » Fri Apr 29, 2016 5:41 am

ok i am doing a test. right now. i have two oscillators...identical both sinewaves set to retrigger phase...

i turn the 1st oscillator's phase all the way to the left....and the 2nd oscillator all the way to the right.....and they cancel eachother out....it is silence....

this therefore proves that when the phase knob is at the center (default) value.....it is actually at 180degrees phase...and not 0 degrees

Howard · Post by **Howard** » Fri Apr 29, 2016 7:13 am

Nonono... sine waves cancel each other out when they're 180° out of phase, so the centre is 90°.

zethus909 · Post by **zethus909** » Fri Apr 29, 2016 8:16 pm

hehe whoops that's what I meant. which I think is weird because the default of 90 isn't at the waveforms "atmospheric pressure" state etc. whatevs

ATN69 · Post by **ATN69** » Sat Apr 30, 2016 5:37 am

I hope its okay if I ask a couple of questions here in this thread, regarding Zebra2 oscillators. I been looking for answer all over the web but did not find anything. I owned Zebra2 for quit a while but only recently started to design sounds of my own with it. I did not find any pure sine tone wave shapes, so I wonder if there are any in the factory library?
Next question is if it is possible to load up other wave tables except for the ones coming with Zebra2 originally?

Cheers!

ATN69 · Post by **ATN69** » Sat Apr 30, 2016 8:37 am

ATN69 wrote:I hope its okay if I ask a couple of questions here in this thread, regarding Zebra2 oscillators. I been looking for answer all over the web but did not find anything. I owned Zebra2 for quit a while but only recently started to design sounds of my own with it. I did not find any pure sine tone wave shapes, so I wonder if there are any in the factory library?
Next question is if it is possible to load up other wave tables except for the ones coming with Zebra2 originally?

Cheers!

Obviously all I had to do was to ask the question and then I found my missing sine waves

..but one question still remain and that is if its possible to load up more wave tables in Zebra2?

exmatproton · Post by **exmatproton** » Sat Apr 30, 2016 9:37 am

ATN69 wrote:
ATN69 wrote:I hope its okay if I ask a couple of questions here in this thread, regarding Zebra2 oscillators. I been looking for answer all over the web but did not find anything. I owned Zebra2 for quit a while but only recently started to design sounds of my own with it. I did not find any pure sine tone wave shapes, so I wonder if there are any in the factory library?
Next question is if it is possible to load up other wave tables except for the ones coming with Zebra2 originally?

Cheers!
Obviously all I had to do was to ask the question and then I found my missing sine waves ..but one question still remain and that is if its possible to load up more wave tables in Zebra2?

Yes, you can. In the folder "Zebra2\Modules\Oscillator", you can add h2p wavetable files. You can find those tables overhere:

http://www.u-he.com/PatchLib/zebra.html#mseg

u-he

KVR Audio

Zebra's oscillators