Expressive Acoustic Guitar Sound Synthesis with an Instrument-Specific Input Representation and Diffusion Outpainting

• URL: http://arxiv.org/abs/2401.13498v1
• Date: Wed, 24 Jan 2024 14:44:01 GMT
• Title: Expressive Acoustic Guitar Sound Synthesis with an Instrument-Specific Input Representation and Diffusion Outpainting
• Authors: Hounsu Kim, Soonbeom Choi, Juhan Nam
• Abstract summary: We propose an expressive acoustic guitar sound synthesis model with a customized input representation to the instrument. We implement the proposed approach using diffusion-based outpainting which can generate audio with long-term consistency. Our proposed model has higher audio quality than the baseline model and generates more realistic timbre sounds.
• Score: 9.812666469580872
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Synthesizing performing guitar sound is a highly challenging task due to the polyphony and high variability in expression. Recently, deep generative models have shown promising results in synthesizing expressive polyphonic instrument sounds from music scores, often using a generic MIDI input. In this work, we propose an expressive acoustic guitar sound synthesis model with a customized input representation to the instrument, which we call guitarroll. We implement the proposed approach using diffusion-based outpainting which can generate audio with long-term consistency. To overcome the lack of MIDI/audio-paired datasets, we used not only an existing guitar dataset but also collected data from a high quality sample-based guitar synthesizer. Through quantitative and qualitative evaluations, we show that our proposed model has higher audio quality than the baseline model and generates more realistic timbre sounds than the previous leading work.

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