Zebra Filter Library

[hollo]

Hi,

With your help, i would like to build a comprehensive knowledge base about filters here.

Shure all of us have favorit filters in Zebra, but i would like to understand when to use the less known filters too.

I'm shure Urs put all of them in for a good reason, so when
i find one filter too harsh for a specific sound, just blindly searching some other will be maybe better.

Just realized how much different the osc fx filter from the others,
or XMF LP3, LP2, etc...

So if we put together what we already know, will be good for many of us. We can save a lot of search on the internet.

If i wan't to get some Oberheim pad sound i would take Vintage2
filter with that warm drive, maybe OldDrive.

For Jupiter sounds nice to get first the HP 12dB with drive and
some LP after. But i'm not shure witch LP?

Here is a list of the most popular old synths, feel free to add yours too.
I would like you to add infos to them: What type of filters they had, and if you know: what filters can substitute them in Zebra.
Any other tips about use of filters is welcome!

Cheers,


Moog
Minimoog: LP 4pole/24dB
Polymoog: Hp?
Memorymoog: Lp 24dB

Oberheim
Four Voice: Lp, Bp, Hp, Notch with Res
OB8: 2-4pole
OBX: 2pole
Matrix6-12:
Xpander: 1pole/6dB, 2pole/12dB, 3Pole/18dB, 4pole/24dB

Prophet5: Lp 24dB w. Res (must hade HP?)
Prophet VS: Lp 4pole/ ? dB

ARP 2600: 4pole/24dB
VCS 3:

Yamaha CS80: Lp ? w. Res, Hp ? w. Res

PPG wave2.2: Lp 24 dB

Ensonic
SQ80 Lp 4pole/ ?dB
VFX: Multimode Lp, Hp 24dB, Bp 12dB

Roland
Jupiter8: LP 2pole, 4pole/24dB, HP ?
Juno60: Lp with Res, Hp non Res
JX10: Lp with Res, Hp non Res
D-50: Lp w. Res

Korg
MS20: 2Multimode, Lp, Hp, Notch, BandReject
Polysix: Lp w. Res
Poly800: Lp
M1: Lp non Res
Wavestation: Lp non Res
Karma: Lp 24dB, Lp, Hp 12dB

Virus: 2 independent multi-mode filters (HP, LP, BP, BS) and the Analog Filter which was modeled after the Moog MiniMoog™ cascade filter with 6-24 dB Slope and self-oscillation.

[PietW.]

Take a look at here.
Morpheus had a lot of filters. Something like that would be also in Zebra2.
http://www.vintagesynth.com/emu/morpheus.php

[hollo]

I still have Emu-E6400 Sampler with the Z filters.
It would be a very nice addition to Morph filters in Zebra,
as we can morph waveforms!!!
Anyway we are almost there, if we set up 2 filters and modulate them to crossfade...well not really: we would need a script to morph between the parameters of 2 filter.

- also Emus has an incredible
patch matrix, with lag, diode, ramp, quantize, flip flop, gain 4x, sum... - worth to check them!

Emus had legendary sounds because of their filters and
mostly the outputs (converters), until the proteus age,
when they tried to get down to get the mass of costumers
for cheaper prise and cheap sounding presets...sorry

Here i would like to connect the Zebra filters with the name
where they came from. Urs and Howard are very shy to mentioning
company names in the manual.
But we can. Can we? We are not a company just a forum. Hehe.

Cheers

[PietW.]

The characteristic of a filter can be read as a Osciloskop.
I think one could reconstruct the Z-Plane filters.

[Sendy]

Take a look at here.
Morpheus had a lot of filters. Something like that would be also in Zebra2.
http://www.vintagesynth.com/emu/morpheus.php

I had a good look at the juicy bits of the owner's manual... I feel sorry for the guy who had to write descriptions of all four parameters of all 190-odd Z-plane filters.

125 - Well this one has resonant peaks at the bottom and thinner peaks at the top. It tracks the keyboard like an oboe that will morph into a piano when you increase morph 2.

126 - A bit similar to 125 but where there were thin peaks, they are now thick, and there's a trace of cat in there if you jiggle one of the parameters just right

...

The best way to learn about Zebra's filters is to watch their actions on a spectrogram. That tells you all you really need to know (apart from perhaps tidbits like which synth it was modelled on)

[hollo]

Now i found the missing numbers on the internet.
Some of them missing the db/Okt, some missing the pole/slope.

I thought I saved the search time... - i'm not.

Looks like the XMF LP4, LP3, LP2, LP1 very alike to the
Oberheim Matrix numbers. ???



-Sendy - you are absolutely right, but if someone i respect, like Howard telling me: use the HP3LP for this and that sound i could save 5 hours sitting front of the oscilloscope.

I am a musician, i can use that time making music, or sounds.
I never interested so much about filters in my synths, just now
with this addictive, lovely Zebra beast.

Cheers,


And have not even talked about how much I look forward to the new smooth filters in the Zebra update!