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Magenta and deeplearn.js: Real-time Control of DeepGenerative Music Models in the Browser
Curtis Hawthorne · Ian Simon · Adam Roberts · Jesse Engel · Daniel Smilkov · Nikhil Thorat · Douglas Eck

Wed Dec 06 07:00 PM -- 10:30 PM (PST) @ Pacific Ballroom Concourse #D6

There has recently been increased interest in generating music using deep learning techniques, leading to remarkable improvements in the quality and expressiveness of sequence-based models.

Beyond unconditional generation, we aim to explore the ability of the generative models to augment the creativity of musicians and novices alike. To be successful, both the model and the user interface must expose high-level and expressive controls that empower users to explore novel musical possibilities. Furthermore, the interface must be easy both for casual users to access and for professional users to integrate into existing creative workflows. This is key to new directions in adaptive feedback and training of models based on user preferences.

To this end, we train state-of-the-art generative models with conditional controls for several musical domains — virtuosic piano performances, looping melodies and drum beats — and demonstrate user interfaces to control generation from these models in real time using only code running in a browser-based JavaScript environment via deeplearn.js.

Author Information

Curtis Hawthorne (Google Brain)
Ian Simon (Google)
Adam Roberts (Google Brain)
Jesse Engel (Google Brain)
Daniel Smilkov (Google)
Nikhil Thorat (Google)
Douglas Eck (Google Brain)

I’m a research scientist working on Magenta, an effort to generate music, video, images and text using machine intelligence. Magenta is part of the Google Brain team and is using TensorFlow (www.tensorflow.org), an open-source library for machine learning. The question Magenta asks is, “Can machines make music and art? If so, how? If not, why not?” The goal if Magenta is to produce open-source tools and models that help creative people be even more creative. I’m primarily looking at how to use so-called “generative” machine learning models to create engaging media. Additionally, I’m working on how to bring other aspects of the creative process into play. For example, art and music is not just about generating new pieces. It’s also about drawing one’s attention, being surprising, telling an interesting story, knowing what’s interesting in a scene, and so on. Before starting the Magenta project, I worked on music search and recommendation for Google Play Music. My research goal in this area was to use machine learning and audio signal processing to help listeners find the music they want when they want it. This involves both learning from audio and learning from how users consume music. In the audio domain, the main goal is to transform the ones and zeros in a digital audio file into something where musically-similar songs are also numerically similar, making it easier to do music recommendation. This is (a) user-dependent: my idea of similar is not the same as yours and (b) changes with context: my idea of similarity changes when I make a playlist for jogging versus making a playlist for a dinner party. I might choose the same song (say "Taxman" by the Beatles) but perhaps it would be the tempo for jogging that drove the selection of that specific song versus "I like the album Revolver and want to add it to the dinner party mix" for a dinner party playlist. I joined Google in 2003. Before then, I was an Associate Professor in Computer Science at University of Montreal. I helped found the BRAMS research center (Brain Music and Sound; www.brams.org) and was involved at the McGill CIRMMT center (Centre for Interdisciplinary Research in Music Media and Technology; www.cirmmt.org). Aside from audio signal processing and machine learning, I worked on music performance modeling. What exactly does a good music performer add to what is already in the score? I treated this as a machine learning question: Hypothetically, if we showed a piano-playing robot a huge collection of Chopin performances--- from the best in the world all the way down to that of a struggling teenage pianist---could it learn to play well by analyzing all of these examples? If so, what’s the right way to perform that analysis? In the end I learned a lot about the complexity and beauty of human music performance, and how performance relates to and extends composition.

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