Rossum Linnaeus Thru-Zero State-Variable Filter

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mdoudoroff
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Rossum Linnaeus Thru-Zero State-Variable Filter

Post by mdoudoroff » Wed May 08, 2019 4:24 pm

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Following in the tradition of Evolution and Morpheus, LINNAEUS represents yet another Dave Rossum innovation in filter technology.

LINNAEUS is a stereo state-variable filter that provides the unique ability to linearly modulate its resonant frequency through zero into negative frequency, while maintaining stability. With extensive voltage control of nearly every parameter, Linnaeus lets you manipulate the filter’s natural response curve in new ways, to create both subtle and dramatic timbral effects. And with a “one-knob-per-parameter” interface, LINNAEUS inspires sonic creativity that invites (and rewards) real-time interaction.

LINNAEUS’s cutoff/resonant frequency is exponentially voltage controllable from sub-audio to ultrasonic frequencies, while its resonant gain (Q) is exponentially voltage controllable from 0dB to greater than 60dB.

LINNAEUS’s channel output response characteristics are independently and continuously variable from Lowpass, through Bandpass, Highpass and Notch, to Low and High Shelving characteristics. Voltage control of the response characteristics are independently selectable for each of the two channels.

The linear thru-zero modulation is provided by an integrated modulation oscillator and/or an External Linear FM modulation input.

The voltage-controllable modulation oscillator can track the filter’s exponential frequency or operate independently. The modulation oscillator’s output waveform is continuously variable from Off through Sine, Triangle, and Sawtooth, to Square. The modulation oscillator output is summed with the external linear FM input and applied to the modulation index VCA, which controls the linear thru-zero modulation index from zero to 8X. The modulation index is, of course, also voltage controllable.

LINNAEUS features include:

– Ultra-wide frequency range, exponentially voltage-controllable from sub-audio to ultrasonic via precise 1V/OCT and attenuverted CV inputs.

– Thru-zero linear frequency modulation via an internal modulation oscillator and/or an external linear FM input.

– Variable linear modulation index, voltage-controllable via an attenuverted CV input.

– Resonance (Q) exponentially voltage-controllable from 0dB to greater than 60dB via 6dB/V and attenuverted CV inputs.

– Continuously variable response characteristics independently selectable for each of the two channels via individual Enable controls. Characteristics include Lowpass (12db/oct and 6db/oct), Bandpass, Highpass (12db/oct and 6db/oct), Notch, and Low and High Shelving.

– Voltage control of response characteristics via an attenuverted CV input. Individual Enable controls let you independently enable or disable CV control of response for each channel.

– An integrated modulation oscillator with continuously variable waveform from Off through Sine, Triangle, Sawtooth and Square. Its frequency can be exponentially voltage controlled via an attenuverted CV input.

– A Track control that lets the modulation oscillator precisely track the filter’s exponential frequency.

– Stereo inputs and outputs. LINNAEUS can process a stereo signal or two independent mono signals. While the two channels share the filter’s cutoff/resonant frequency, the filter response characteristics can be independently controlled for each channel.

– The solid, high-quality construction you expect from Rossum Electro-Music.

LINNAEUS is 16HP wide and 25mm deep.

Power requirements (max): 140mA +12V, 25mA -12V. Reverse polarity protected.

LINNAEUS will be available this summer from Rossum Electro-Music dealers worldwide.

http://www.rossum-electro.com/products/linnaeus/

~$399

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TemplarK
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Post by TemplarK » Wed May 08, 2019 4:34 pm

Wow. Damn this is a crazy module!

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Joe.
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Post by Joe. » Wed May 08, 2019 4:42 pm

Voltage control of the response characteristics are independently selectable for each of the two channels.
I don't understand how this part works. there's one CV input, but you can control both (L&R) filter's response independently?

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TemplarK
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Post by TemplarK » Wed May 08, 2019 4:50 pm

Joe. wrote:
Voltage control of the response characteristics are independently selectable for each of the two channels.
I don't understand how this part works. there's one CV input, but you can control both (L&R) filter's response independently?
I think it just means you can turn off whether its being effected by the CV for each channel. Thats what I'm reading from it at least.

edit - Oh and it seems like you can set whether its high or lowpass etc for each channel also. Pretty neat!

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Post by johny_gtr » Wed May 08, 2019 4:58 pm

A year of stereo filters :miley:
Unfortunately can’t find any demos of it, maybe after SB

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Joe.
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Post by Joe. » Wed May 08, 2019 5:01 pm

Definitely looking forward to hearing some demos :tu:

Futuresound

Post by Futuresound » Wed May 08, 2019 5:47 pm

Can't wait to hear this. It seems like Rossum is on a roll. And maybe trying a new design approach? Panharmonium, Trident and now this all seem a bit different than say Control Forge or Assimil8or.

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Virusinstaller
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Post by Virusinstaller » Wed May 08, 2019 7:05 pm

It's like the year of crazily amazing stereo filters.
It just doesn't stop.
My heart and wallet are hurting.
Super innovative. Can't wait to hear some demos.

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Jumbuktu
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Post by Jumbuktu » Wed May 08, 2019 7:46 pm

It also seems to be the year of 'through-zero'. I'm waiting for someone to release the first through-zero multiple.

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Post by mafouka » Wed May 08, 2019 8:31 pm

So awesome :party:
這一生中有多少人擦肩而過?而朋友是多麼可貴啊

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2disbetter
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Post by 2disbetter » Thu May 09, 2019 1:45 am

I for one, look forward to the day, when I can build an entire instrument around Rossum modules.

This looks ace, and I too am looking forward to demos!

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Post by synonymist » Thu May 09, 2019 6:12 am

Jumbuktu wrote:It also seems to be the year of 'through-zero'. I'm waiting for someone to release the first through-zero multiple.
Quotable!

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Post by jmax313 » Thu May 09, 2019 8:41 am

wowow!! :hyper:

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Post by kingcons » Thu May 09, 2019 12:14 pm

Demo on analoguezone's instagram:

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Shakespeare
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Post by Shakespeare » Fri May 10, 2019 5:52 am

Wow... that thing sounds and looks very interesting.

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Post by MindMachine » Fri May 10, 2019 9:11 pm

The very first bits sound very LPG. Great tone. Lots of modulation to be patched. Very interesting for sure.

Love Rossum and his enthusiasm. That guy has reinvented himself so many times. What an amazing line of modules with his latest venture.

He is one of the unsung pioneers of the field. Oberheim and Sequential Circuits are generous in their debt of gratitude to him and Scott Wedge, but us mere mortal users may not be so aware of his and Mr. Wedge's significance to modern electronic instrument design.
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Marco Alpert
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Post by Marco Alpert » Sat Aug 17, 2019 2:13 pm

With the release of Linnaeus just weeks away, we’ve posted the Quick Start Guide to the web site. Also, here’s the final production panel. What’s with the egg? Well, late in the beta testing process, our good friend and tester, Chris Meyer, raised the possibility of alternative behavior that would let Linnaeus function as a self-contained (i.e., no input required) stereo oscillator and/or FM percussion voice with some really powerful timbral capabilities.

While we were initially hesitant to try to shoehorn the new functions into the existing interface, once Dave had prototyped them, it was clear to us all that they were just too cool not to include. So we’ve provided them in the form of alternate "Ping Mode" firmware accessed by pressing and holding the Egg button.

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brandonlogic
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Post by brandonlogic » Sat Aug 17, 2019 2:18 pm

Is this module fully digital or is it a fully analog audio path with some digital control?

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Marco Alpert
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Post by Marco Alpert » Sat Aug 17, 2019 2:22 pm

brandonlogic wrote:Is this module fully digital or is it a fully analog audio path with some digital control?
It's fully digital.
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Post by synonymist » Sat Aug 17, 2019 8:27 pm

Marco Alpert wrote:accessed by pressing and holding the Egg button
Hello Marco. Mostly I wanted to say how cool it is that your company makes a synth module that features an "Egg button". Surely yours is the only one. :)

But also I applaud Rossum Electro-Music for having the imagination and guts to expand the feature set of a stable product just before its release, when you knew it was the right thing for the product.

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Post by Bots » Thu Sep 26, 2019 5:58 am

Hi, i'm really interested in this filter but are there allready people owning the Linnaeus?

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matttech
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Post by matttech » Thu Sep 26, 2019 11:21 am

there definitely are, because I sold them to them! :hyper:

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Switchzik
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Post by Switchzik » Thu Sep 26, 2019 11:52 am

Any chance to have a demo ? Looks amazing but we didn't hear much of it which is a pity.

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Post by Bots » Thu Sep 26, 2019 2:07 pm

Yes a demo would be great :tu:

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Post by B0bcat » Thu Sep 26, 2019 9:13 pm

they must be out in the wild now - also keen to hear a demo!
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