Muzic is a research project that uses deep learning and artificial intelligence for music understanding and generation. It includes multiple AI models for symbolic music understanding (MusicBERT), automatic lyrics transcription (PDAugment), and contrastive language-music pre-training (CLaMP). For music generation, it encompasses lyric-to-melody and melody-to-lyric tasks (SongMASS), lyric generation (DeepRapper), and music form generation (MeloForm). The project provides a collection of research models and tools for AI-driven music composition.