Featured demos


The MTG produces a wide variety of technologies that contribute to the music technology research community. Some of these technologies are also aimed at industrial applications.

Explore the MTG demos to discover some of our technologies.

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Sound and music analysis and classification

We work on different levels of analysis, from low- and mid-level acoustic and musical features to semantic categories such as moods, genres, and instrumentation, applying a wide range of signal processing and machine learning methodologies.

Essentia: Music audio descriptors in the browser

Examples of music audio analysis with Essentia algorithms using Essentia.js, a JavaScript (JS) library for music/audio signal analysis and processing that allows running an extensive collection of music/audio processing and analysis algorithms/models on your web browser or Node.js runtime applications. It supports both real-time and offline audio analysis use-cases.

Essentia.js examples

Essentia: TensorFlow Models

Examples of inference with the pre-trained TensorFlow models for music auto-tagging and classification tasks.

Essentia TensorFlow


The AcousticBrainz project aims to crowd source acoustic information for all music in the world and to make it available to the public. This acoustic information describes the acoustic characteristics of music and includes low-level spectral information and information for genres, moods, keys, scales and much more.

AcousticBrainz Demo

Technologies applied to music education

Based on signal processing, machine learning or motion capture techniques, we develop technologies to understand and enhance the music learning process. We facilitate the learning and assessment of most aspects of music performance: from sound quality production and gestural control to intonation, rhythm, timbre, and expression.


Music Critic

Music Critic is a collections of software tools to support music education applications. 

Music Critic Demos

Musical Bridges

Interactive tools for facilitating the understanding of different musical cultures to the general public. An example of those tools is the Rāg visualizer, aimed to guide the listening attention to the characteristic melodic phrases in real performances and how they are rendered every time they are performed, as well as to browse a particular recording in terms of these characteristic phrases.

Rāg visualizer Demo

Interaction and exploration of large sound and music collections

A common goal in many of our research projects is the creation of large sound and music collections, releasing them as open datasets that can be reused by researchers and practitioners. Some examples are Freesound, a collaborative database of sounds; AcousticBrainz, an open dataset containing music analysis data of millions of tracks; or Dunya, a music corpora created with the aim of studying particular music traditions.

Freesound API: Freesound explorer

Freesound API allows to browse, search, and retrieve information about Freesound. You can find similar sounds to a given target (based on content analysis) and retrieve automatically extracted features from audio files, as well as perform advanced queries combining content analysis features and other metadata. Freesound Explorer is an example of Freesound API potential functionalities. It is a visual interface for exploring Freesound in a 2-dimensional space and create music.

Freesound Explorer Demo

Freesound API: SOURCE

SOURCE is an open-source music sampler powered by Freesound's collection of 500k Creative Commons sounds contributed by a community of thousands of people around the world. SOURCE provides different ways to load sounds from Freesound and instantly generate new sound palettes to enrich the creative process and bring an endless SOURCE of inspiration.



Dunya comprises music corpora and related software tools created with the aim of studying particular music traditions: Hindustani (North India), Carnatic (South India), Turkish-Makam (Turkey), Arab-Andalusian (Maghreb), and Beijing Opera (China). They include audio recordings plus complementary information that describes the recordings. Each corpus has specific characteristics and the developed software tools allow to process the available information in order to study and explore the characteristics of each musical repertoire.

Dunya Demo

Music technologies for health and wellbeing

We investigate on how music can improve the physical, cognitive and emotional conditions of people, using technologies for music personalization, music interaction and adaptive digital music instruments

Banda Sonora Vital

Web-based technology that aims to address the need to recover meaningful music of Alzheimer’s patients for their day-to-day listening, as well as in therapeutic interventions

Banda Sonora Vital Demo