Jupiter 80/MKS-80 strange saw wave shape ?

[Mutant]

Hi.
Few days ago while looking for some synth sounds on YT i found this video:

And immediately i thought to myself "what a mighty strong saw wave ! i wonder what it would take to match it with my favorite VSTi".
So i imported the sound to REAPER and checked it on Dust Analyzer oscilloscope.
Hmm.. That doesn't even look like saws i know from other synths...
So some tweaking, overdrive, EQ on the VSTi side and this is the result:

On SPAN, green is VSTi, red JP80.
On Dust Analyzer sea blue is VSTi, pink JP80 (you can see that there is some noise here, i didn't try to match it with the VSTi because what i was interested in was saw shape only).
And the EQ curve on ElectriQ Posihfopit it took to get the shapes close enough for my purposes.

Here is how it sounds:
https://app.box.com/s/1sos9dp3gnvgl1reflfrznt7l3j0oky8
Panned hard left and right.
(matching it perfectly was not my objective, i just wanted to see what it would take to get it close)
-------------------------------------

So the question is: I assumed that for his experiment the author of that video would not use any effects on the 2 synths he wanted to compare. Was i wrong ? Is this really how saw wave looks and sounds on Jupiter 80 and MKS-80 ?

[EvilDragon]

Yes, that's how it looks after it passes through the mixer and filter, and probably some DC-blockers along the way, too. If you tapped the direct output from the oscillator before it hit any of those, you'd get a proper sawtooth with jagged edges and everything.

[Mutant]

Yes, that's how it looks after it passes through the mixer and filter, and probably some DC-blockers along the way, too. If you tapped the direct output from the oscillator before it hit any of those, you'd get a proper sawtooth with jagged edges and everything.

Direct experience ?
I understand that mixer can affect sound a little bit, but what kind of "filter" do you mean ?
If you look at the curve on the EQ i used, thats some HEAVY filtering.
To be precise we are talking about the first part of the video, according to the description the filter comes into play only in 2nd and 3rd parts.

[edit]
Ah so you mean internal mixer and filter sections ? Not some external hardware ?

I wonder if Arturia emulates that internal overdrive and 100% open filter behavior in their plugin.

[EvilDragon]

Yes, I mean internal filter and mixer.

Even if a filter is 100% open, it CAN (and will) influence the sound in various ways. But DC-blockers are what can change the shape of the oscillator waveform, since it's basically a highpass filter.

[Mutant]

OK thx.

[Mutant]

Facepalm... i forgot that Diva kinda emulates the JP-8
Tried it just now and it looks like 90% of the shape is made with oscillator shape parameter set to "analog1" and HPF set at about 30%, but TubeDriver is needed there too to get it to 99%.
But no external EQ was necessary as it was with Xhip earlier.

I'll check if i can tweak the 2nd filter on Xhip to emulate the sound without EQ.
[edit]
Yep 99% there, but with the TubeDriver at quite high drive setting and i had to close the 24dB filter a tiny bit.

[Chris-S]

The hardware uses a highpass filter, to get rid of sub fundamental noises.

[Mutant]

Yes i discovered it on Diva, as i said above, the HPF had to be set on about 30%.
A bit strange that any kind of filter was used in that video that i (wrongly) assumed was made to show raw sound (ofc not connected directly there) of the oscillator in the first part.