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Dual 16 Bands Spectral Editor

fumana / fuˈma:na / s.f. [dialect of Modena, from Latin fūmus, ‘smoke’] – ‘fog’. Like specters use to lie into the thick fog (which the Modenese countryside is pretty rich of), so many spectral capabilities and functions do within the thick bands of the ‘fumana’.




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FUMANA is a dual all-analog fixed filter bank. Each filter bank is composed of an array of 16 independent bandpass filters tuned to specific frequencies.

We designed FUMANA around one basic core principle: modify the spectral content of the incoming audio signal by filtering it through 16 bandpass filters in parallel and then vary the amplitude of each resulting band.

Even though this core principle is relatively simple, the key feature of FUMANA is that it provides a wide set of controls over the bands’ amplitude: the spectral content of the incoming sound can be thus modified by the faders, which are individually CV-controllable; by the envelope followers which are generated by the analysis of the sound patched in the Modulation input; by the global parametric controls such as Tilt and Scan.

Furthermore, a flexible input/output signal routing allows the musician to “split” the 16 filters into two 8-band spectral processors by grouping the odd and even bands separately. It will be possible to process two independent signals, or to blend two signals into one output, or even to perform two different sonic treatments over the same signal and route it to two different output sections.

Individual outputs are available for each band, both for the Main sound (i.e. the filtered one) and for the Mod sound (i.e. the resulting envelopes).

Since a spectral transfer tool may be used as a “vocoder-like-effect”, the FUMANA provides an input for an external noise which may be used for fricative/sibilant sounds.

Key Features

FUMANA has two arrays of sixteen bandpass filters each. The first one, with 48 dB/oct filters, provides a colorful tool for processing your sound.

The second one, with 36 dB/oct filters, analyzes a sound and extracts sixteen envelopes for spectral transferring.

You can sculpt your sound through the sixteen faders and voltage-control them individually.

Then, you can further animate the timbre through four voltage-controlled functions: Tilt, Peak/Notch, Center, and Width.

Two semi-normalled inputs allow you to use FUMANA as a single sixteen-band or two eight-band spectral editors.

The division is between Odd and Even bands so that you can:

  • Process two different sounds in the Odd and Even bands and merge them to a single All output;
  • Process a single sound and route its Odd and Even bands to two different points of your patch (like for stereo spread);
  • Process two separate sounds with independent routing.

A parallel array of sixteen bandpass filters allows you to perform spectral transferring or vocoding over all the sixteen bands.

You can even use two different sounds for the Odd and Even Bands, performing two eight-band vocoding operations at the same time!

You can independently control the attack and release time of the spectral transferring and also access the individual bands’ envelope followers.

Such outputs allow you to manually re-route the analysis bands to the synthesis ones, just like in classic analog vocoders.

A global Envelope Follower Output is available for external ducking or other parallel processing.




Additional information

Weight 0,77 kg
Dimensions 15,6 × 23,6 × 6 cm

18 HP



42 HP


38 mm

Current draw

430 mA @ +12 V

390 mA @ -12 V

CV input impedance

>90 KΩ

CV output impedance

<50 Ω

Audio input impedance

>20 KΩ

Audio output impedance (main)

<50 Ω

Audio output impedance (individual filters)

<250 Ω

Envelope followers amplitude from 0-10 V (1)

±5 %

More details on the Manualone.


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A. Use

Our modules are packed with high-quality components that demand a proper power supply and can get sensibly warm.

That is its normal temperature and we can guarantee their performance.

The MOD inputs route an external signal to an array of 16 filters at the same frequencies of the main filter array that shapes the sounds you patch to the MAIN input.

However, the product of these 16 modulation filters is not audible, since their purpose is to generate as many envelopes according to the intensity of the signal passing through each band. The envelopes then control the amplitude of the main 16 bands. This function is often referred to as ‘spectral transferring.’

If you patch an LFO to the modulation inputs you will not hear anything, since its frequency will be below the cutoff of the lowest filter.

If you patch a sawtooth or a square LFO, however, FUMANA will detect the transients, thus providing interesting, snappy sounds.

B. Design

We have two main kinds of capacitors.

The first one is necessary to AC-couple the audio signal: they prevent any unwanted DC offset, and they offer protection against wrong connections. For this reason, you can patch nearly every input to every output, and the worst thing that can happen is some pops or some silence.

The second one is power filters to guarantee a cleaner current flow across the case. They might sound a bit over the top, but we must remember that a Eurorack system is not something that comes straight out of the factory. Instead, every Eurorack setup is unique and may change according to the musician’s need. For this reason, we want to add as much protection as we can, both to avoid issues with our modules and to ensure that even the other modules behave correctly. We use a wide mix of capacitors in our modules: ceramic, electrolytic, tantalum, and multilayer. They can be assembled thru-hole or SMD, according to what gives the best balance between result and space. For example, all the electrolytic capacitors are mounted thru-hole because they perform better according to our tests.

However, the capacitors have zero impact on the power draw, on which you can read in this other FAQ.

Power draw should always be related to what a module does.

Generally speaking, there are modules like SAPÈL that undoubtedly consume more than other random generators. However, SAPÈL is a double module, so a fair comparison would be between it and a pair of similar modules. The same can be said for FUMANA, the most power-demanding filter bank. However, it is also the only Eurorack filter bank with 32 analog bandpass filters, half of which have a 48 dB/oct slope. So, also in this case, a fairer comparison would be between FUMANA and TWO other 16-band filter banks, which leads to similar power consumptions.

More in detail, we engineer our modules to be safe to use. To protect both the modules and the rest of the case, we add a proper buffering stage to every input and output: even if a single buffer doesn’t draw that much power, all the ins and outs piled together can significantly impact the final power draw.

C. Shop

Yes! We opened our online store in October 2022. Check out the full catalog!

Our resellers receive our modules exclusively through our distributor, so we do not have access to the individual shops’ orders or stocks.

We restock every module at least once over a year: we focus on a module’s batch at a time, then we move on to the next one, and so on.

If you want an estimated delivery time for a specific module, drop us a line! We’ll be happy to answer you.