SoundBoost

SoundBoost is an AI mastering platform for musicians, producers and audio professionals preparing releases: upload a WAV or MP3, describe the sound you want in natural language, pick an AI mastering engineer profile, or drop a Spotify reference track — and it analyzes the mix and applies a custom signal chain across loudness, tone, dynamics, stereo width, warmth and clarity. Free tools include a stem splitter, vocal remover and loudness meter; one subscription covers web, iPhone, iPad and Android. Newly added: a music video generator that turns a finished song into a video.

Directing a mastering session in words is the honest innovation here — traditional mastering is exactly this loop (describe, listen, adjust), just with a human engineer and day-long turnaround.

Who it's for: independent artists mastering singles without studio budgets, producers wanting a fast first-pass master before human ears, and podcasters evening out episode loudness. Free tier to try. The standard test: master one track, then A/B it against a streaming-reference loudness target on real monitors or headphones — mastering quality lives and dies in the last 5% that cheap speakers can't reveal.