MockingBird is a Chinese voice cloning system implementing the SV2TTS (Speaker Verification to Text-to-Speech) framework. It provides a complete pipeline for few-shot voice cloning: a speaker encoder extracts d-vector embeddings from reference audio, a synthesizer (Tacotron with Global Style Tokens or VITS) converts text to mel-spectrograms conditioned on the speaker embedding, and a vocoder (HiFi-GAN, Fre-GAN, or WaveRNN) generates waveforms. It also includes a PPG-based voice conversion path using a Conformer-based PPG extractor and a PPG2Mel converter. The system supports multiple Chinese datasets (aidatatang_200zh, magicdata, aishell3, data_aishell) and provides web UIs (Streamlit/FastAPI), a PyQt5 toolbox, and CLI tools for training and inference. The codebase is a fork of Real-Time-Voice-Cloning adapted for Mandarin with significant additions including VITS synthesizer, multiple vocoder options, emotion extraction via wav2vec2, and a modern web API layer. While the original author has moved to a commercial product (noiz.ai), the repository shows recent commits (2026) and maintains a large community (36k stars).