COAT: A Music Recommendation Model based on Chord Progression and Attention Mechanisms

Abstract

Recently, efforts have been made to explore introducing music content into deep learning-based music recommendation systems. In previous research, with reference to tasks such as speech recognition, music content is often fed into recommendation models as low-level audio features, such as the Mel-frequency cepstral coefficients. However, unlike tasks such as speech recognition, the audio of music often contains multiple sound sources. Hence, low-level time-domain-based or frequency-domain-based audio features may not represent the music content properly, limiting the recommendation algorithm's performance. To address this problem, we propose a music recommendation model based on chord progressions and attention mechanisms. In this model, music content is represented as chord progressions rather than low-level audio features. The model integrates user song interactions and chord sequences of music and uses an attention mechanism to differentiate the importance of different parts of the song. In this model, to make better use of the historical behavioral information of users, we refer to the design of the neural collaborative filtering algorithm to obtain embedding of users and songs. Under this basis, we designed a chord attention layer to mine users' fine-grained preferences for different parts of the music content. We conducted experiments with a subset of the last.fm-1b dataset. The experimental results demonstrate the effectiveness of the method proposed in this paper.