Putting the keys back onto the platform. The adjusting the springs takes some time.

Roland VK-7 sticky keys red glue problem – solved


About two years ago I bought a nice sounding Roland VK-7. The keyboard was in nice shape – however, it did develop (or had previously) a few flaws during the last year. The first problem (which I also informed of by the previous owner) was a random reset of the whole keyboard. After googling about similar problems other VK-7 owners had,…

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DIL adapter - 64kbit to 16kbit chip converter

Hammond XB-2 – the conclusion


Dejan and I have finally managed to perform one last attempt to fix the Hammond XB-2. As said in my previous blog post, the XB-2 I bought had an interesting distorted sound problem. This is a video of the sound problem: We tried a number of things, including the DRAM swap. Today, we performed the SRAM swap. Since we were not able to obtain…

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Moodo Visualization

Moodo dataset – Mood, Colors and Music in Music Information Retrieval (2013 – today)


Since 2013, I have also been involved in a study trying to determine whether there is a distinctive interrelationship between user’s mood, their perception of colors and their influence on the perception of music, especially in terms of the perceived and induced emotions. We published several conference papers including a paper at ISMIR 2014. Along with the study, we gathered a significant…

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Compositional hierarchical model

A different white-box deep architecture? Is it possible?


I recently published a paper more thoroughly explaining what I have been developing as a part of my PhD research at the Laboratory for Computer Graphics and Multimedia, Faculty of Computer and Information Science. The paper describes an alternative deep architecture. Those of you who are involved in recent machine learning research probably know neural-network-based deep architectures, which recently gained…

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Matevž Pesek

Hello blog!


It has been at least about 4 years since I renovated my blog. The time has come to let the old wordpress blog (here) die away. This time, the content is more focused on my research in the music information retrieval field and my other work in software development, new technologies and music. If interested, my old blog is still available at…

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The XB-2 Main Board

Fixing Hammond XB-2


A few weeks ago Dejan and I began our work on Hammond XB-2 again. The current problem can be heard here: We tracked the problem back to the static RAMs, which was also mentioned as a solution in one of the comments on this similar youtube video. We opened the keyboard and took out the main board. As you can…

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LGM Website

Laboratory for computer graphics and multimedia has a new website


We are proud to present a new website of our beloved Laboratory. Visit the website! 🙂 Although we all loved (the status quo of) our previous website, it’s been the same for almost 10 years. The new website (found at http://musiclab.si and http://lgm.fri.uni-lj.si) is now finally up-to-date with our newest projects, publications and research interests. You’re welcome to visit, if not for…

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Oblačna rešitev ReverSing

ReverSing – zmagovalni študentski projekt – Dnevi Slovenske Informatike 2016


Na Dnevih Slovenske Informatike sva z Luko Zakrajškom predstavljala študentski projekt ReverSing, ki je spletna rešitev za transkripcijo glasbe. Z veseljem sporočava, da bo ReverSing v naslednjih tednih prešel v javno beta fazo. Za tiste, ki vas rešitev zanima, sledi daljši opis projekta, ki je v obliki letaka na voljo tudi tukaj: ReverSing opis projekta. Problem Glasbeniki, učitelji glasbe in glasbeni navdušenci…

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Hammond XB-2 and Roland VK-7

Big boys … new toys: Roland VK-7 and Hammond XB-2


Last week I bought two aswesome instruments  – a Roland VK-7 and Hammond XB-2. The latter unfortunately has the MUSE chip failure. I tested it few months ago and shot this video. I still haven’t given up on it. I checked some options including the XB2-kit. The kit is however more expensive than a fully functional keyboard (and the XB-2…

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