1. DDSP-based Singing Vocoders: A New Subtractive-based Synthesizer and A Comprehensive Evaluation
- Author
-
Wu, Da-Yi, Hsiao, Wen-Yi, Yang, Fu-Rong, Friedman, Oscar, Jackson, Warren, Bruzenak, Scott, Liu, Yi-Wen, and Yang, Yi-Hsuan
- Subjects
Computer Science - Sound ,Electrical Engineering and Systems Science - Audio and Speech Processing - Abstract
A vocoder is a conditional audio generation model that converts acoustic features such as mel-spectrograms into waveforms. Taking inspiration from Differentiable Digital Signal Processing (DDSP), we propose a new vocoder named SawSing for singing voices. SawSing synthesizes the harmonic part of singing voices by filtering a sawtooth source signal with a linear time-variant finite impulse response filter whose coefficients are estimated from the input mel-spectrogram by a neural network. As this approach enforces phase continuity, SawSing can generate singing voices without the phase-discontinuity glitch of many existing vocoders. Moreover, the source-filter assumption provides an inductive bias that allows SawSing to be trained on a small amount of data. Our experiments show that SawSing converges much faster and outperforms state-of-the-art generative adversarial network and diffusion-based vocoders in a resource-limited scenario with only 3 training recordings and a 3-hour training time., Comment: Accepted at ISMIR 2022
- Published
- 2022