HyperGANStrument: Instrument Sound Synthesis and Editing with Pitch-Invariant Hypernetworks
This work addresses the need for better sound synthesis tools for musicians and audio engineers, but it is incremental as it builds upon the existing GANStrument model.
The paper tackles the problem of improving instrument sound synthesis and editing by enhancing reconstruction ability and pitch accuracy, resulting in significant improvements in generation capability and editability of synthesized sounds.
GANStrument, exploiting GANs with a pitch-invariant feature extractor and instance conditioning technique, has shown remarkable capabilities in synthesizing realistic instrument sounds. To further improve the reconstruction ability and pitch accuracy to enhance the editability of user-provided sound, we propose HyperGANStrument, which introduces a pitch-invariant hypernetwork to modulate the weights of a pre-trained GANStrument generator, given a one-shot sound as input. The hypernetwork modulation provides feedback for the generator in the reconstruction of the input sound. In addition, we take advantage of an adversarial fine-tuning scheme for the hypernetwork to improve the reconstruction fidelity and generation diversity of the generator. Experimental results show that the proposed model not only enhances the generation capability of GANStrument but also significantly improves the editability of synthesized sounds. Audio examples are available at the online demo page.