GETMusic: Generating Any Music Tracks with a Unified Representation and Diffusion Framework

TL;DR

GETMusic introduces a unified framework with a novel music representation and diffusion model, enabling flexible generation of any target tracks conditioned on source tracks, surpassing previous methods in versatility.

Contribution

The paper presents GETScore, a new 2D token-based music representation, and GETDiff, a diffusion model, allowing for arbitrary source-target track generation in symbolic music.

Findings

GETMusic outperforms prior methods in specific composition tasks.

The framework effectively generates target tracks conditioned on source tracks.

GETScore enables flexible and comprehensive music representation.

Abstract

Symbolic music generation aims to create musical notes, which can help users compose music, such as generating target instrument tracks based on provided source tracks. In practical scenarios where there's a predefined ensemble of tracks and various composition needs, an efficient and effective generative model that can generate any target tracks based on the other tracks becomes crucial. However, previous efforts have fallen short in addressing this necessity due to limitations in their music representations and models. In this paper, we introduce a framework known as GETMusic, with ``GET'' standing for ``GEnerate music Tracks.'' This framework encompasses a novel music representation ``GETScore'' and a diffusion model ``GETDiff.'' GETScore represents musical notes as tokens and organizes tokens in a 2D structure, with tracks stacked vertically and progressing horizontally over time. At a training step, each track of a music piece is randomly selected as either the target or source. The training involves two processes: In the forward process, target tracks are corrupted by masking their tokens, while source tracks remain as the ground truth; in the denoising process, GETDiff is trained to predict the masked target tokens conditioning on the source tracks. Our proposed representation, coupled with the non-autoregressive generative model, empowers GETMusic to generate music with any arbitrary source-target track combinations. Our experiments demonstrate that the versatile GETMusic outperforms prior works proposed for certain specific composition tasks.