SoundBoost.ai is an AI-powered music mastering platform that lets musicians and producers master tracks using text prompts, reference songs, and AI engineer personas. Users upload their audio, describe the desired sound (e.g., "warm and wide stereo"), and the engine processes the track in under a minute with advanced signal chain modeling. The platform also offers a stem splitter and vocal remover, a visual creator for cover art and promo visuals, and mobile apps for iOS and Android with synced projects. Key features include prompt-based mastering, reference mastering (Spotify links), multiple AI engineer profiles (Sophia, Marcus, etc.), and streaming optimization for platforms like Spotify, Apple Music, and YouTube Music. Free tools such as a LUFS meter and loudness penalty analyzer are available browser-based. SoundBoost.ai is designed for audio professionals, musicians, mastering engineers, and bedroom producers.