ForumsNews ← Vutu: Sound analysis for Sumu.


*** updated with latest Mac and Windows links ***

I've just posted a public beta of Vutu for MacOS (edit: and now for WIndows!). Vutu is the sound analysis program for the upcoming Sumu synthesizer.



A Vutu quickstart video is also online now. I haven't had a chance to write any better documentation yet, and I"m not sure I will before I get the Sumu beta out. However, Vutu in its current form is pretty simple anyway, and most of what you need to know you can find out by fooling around with the dials and listening and looking.

Vutu analyzes sounds using Loris, developed by Kelly Fitz and Lippold Haken at the CERL Sound Group. A detailed intro to Loris is available on Current Research in Real-time Sound Morphing More publications are also linked from the CERL Sound Group Loris page. Loris is distributed under the GNU General Public License (GPL) and thus, Vutu is also. Vutu's source is available on Github.

Vutu is built on a cross-platform GUI framework I developed called mlvg. Compiling it for Windows and Linux should therefore be a reasonably easy task, but I know there will be a bunch of details to iron out, so I'm not taking that on until after I can make a Sumu beta.

That was a lot of info and links. Why would you want to play with Vutu right now? Some reasons might be:

  • You want to get started making your own sound bank for Sumu.
  • You have to try out the newest audio software, whatever it is, and this was just released today.
  • You enjoy looking at bandwidth-enhanced partials and hearing odd noises.

Each voice of Sumu will be able to play back 64 bandwidth-enhanced partials simultaneously. A bandwidth-enhanced partial is basically a single sine wave, modulated with noise. So at any given instant of time, in addition to frequency, amplitude and phase, it also has a bandwidth, or noisiness. Making sounds out of such partials is a very powerful technique, and I think it's pretty easy to grasp. What's been difficult about additive synthesis is the large amount of control data that's needed. How do you generate it all? My answer in Sumu is to use the familiar patchable interface, but extended so that each patch cord carries separate signals for each partial. This allows sound design in a playful, exploratory way that should be familiar to any modular user. Honestly I think it will be fun as hell.

Thanks to Kelly Fitz and Lippold Haken for creating and sharing Loris. Thanks also to Greg Wuller for helping me get going with the Loris source code, and for utu, which became Vutu. Utu is a Finnish word for "mist" or "fog", like Sumu. Vutu is short for visual utu.

Vutu requirements

A Metal-capable Mac running MacOS 10.14 (Mojave) or greater.
Vutu is native for Intel and Apple Silicon.
Since it's an analyzer and not a real-time program (except for playing the results), CPU doesn't really matter.

"Hi Zef, I didn't see this until now—release in December." December 2024 ?

Same as last year. It's ok. But dont get your hopes up.

Software is ready when it's ready--but Sumu came extraordinarily far in 2023 and I suspect we'll see it soon. Happy New Year!

Hello Randy is the Windows version of VUTU finalized. I could beta test it while waiting for Sumu??
Warm regards

Hi, Vutu on Windows is not ready either, they will come out at the same time.

Is sumu still a thing ?
I recall hearing it was maybe out end of the year :)
How close are we to release


just got SUMU was happily playing around, it sounds amazing, and launched vutu and was messing w/some partials.. then went back to logic to mess with SUMU some more.. imported partials. all worked well. took a break, came back and all sound was dead on laptop.. couldn't figure it out. quit out of everything and forgot VUTU was in the background. VUTU had taken over all sound on the laptop. took priority. once i quit it all was fine. just an FYI in case someone else has the experience. VUTU wants priority of audio and will killed audio to everything else on M1, Sonoma.

Just got SUMU too its amazing !!! Finally.
It would be amazing if it was possible to drop file rather than import manually. Small hassle but heh

Anyway if its never implemented its ok! Amazing tools

Thanks for the nice feedback :-)

You can't drag and drop because there are so many controls that affect the way a sound is analyzed, it's not possible to do as an automatic process.

And also for legal reasons!