Keunwoo Choi

PhD ยท AI Scientist/Director ยท New York City/Seoulยท

I apply machine learning and deep learning techniques to solve music and audio AI -- problems such as music tagging/source separation/transcription as well as audio understanding and synthesis.


AI Scientist/Director

Gaudio Lab, Seoul, Korea

Leading an AI music/audio team.

March 2022 - Present

Senior Research Scientist

ByteDance AI Lab, Mountain View, USA

Large-scale deep learning system for music and video content creation, social network, and music streaming service. Music research roadmapping for scalable and sustainable growth.

August 2020 - March 2022

Research Scientist

Spotify, New York, USA

Music content understanding based music discovery for 300M+ users of the global leader in music industry

July 2018 - August 2020


ETRI, Daejeon, South Korea

3D audio reproduction system for immersive acoustic experience

Feburary 2010 - Jun 2014


Queen Mary University of London

PhD in Computer Science, Centre for Digital Music, London, UK
Supervisor: Mark Sandler and George Fazekas
Thesis title: Deep Neural Networks for Music Tagging
October 2014 - March 2018

New York University

Visiting Scholar, Center for Data Science, New York, USA
Supervisor: Kyunghyun Cho
June 2016 - Janurary 2017

Seoul National University

Master in Electric Engineering and Computer Science, Seoul, South Korea
Supervisor: Koeng-Mo Sung
Thesis title: A NMF-Based Mono-To-Stereo Blind Upmix
March 2009 - Feburary 2011

Seoul National University

Bachelor in Electric Engineering and Computer Science, Seoul, South Korea
Full tuition fee waiver scholarship (2005 - 2009)
March 2005 - Feburary 2009


๐Ÿ† I received Best Paper Award at ISMIR 2017, the most prestigous music information retrieval research conference.

๐Ÿ–ฅ I am the creator and maintainer of Kapre, a Python package for Tensorflow (Keras) Audio Preprocessing layers.
โŒจ๏ธ I am a contributor of librosa, Keras, and torchaudio.

๐Ÿ“„ I first-authored 10+ peer-reviewed papers at venues including ISMIR, ICASSP, EUSIPCO, ICML Workshop, etc.
๐Ÿ“– I review papers at NeurIPS, ICML, ICLR, ISMIR, ICASSP, AAAI, etc.
๐Ÿ“• I co-authored a web book about music classification. We used it in our tutorial at ISMIR 2021

๐ŸŽผ I write music and ๐Ÿ“ธ take pictures.