SoundBoost.ai
Instant professional music mastering, powered by AI
Overview
SoundBoost.ai's real hook is speed and simplicity: a roughly one-minute turnaround and natural-language controls make it approachable for producers who don't know traditional mastering terminology, while still offering enough revision and A/B tools to satisfy more experienced users. The loudness/playback simulator is a genuinely useful extra that most competing AI mastering tools (like LANDR or eMastered) don't emphasize as heavily.
The catch is pricing transparency — the publicly visible pricing shows an annual rate around $4/month for one tier, but a second ‘Unlimited Plus’ tier with more features (bulk mastering, unlimited revisions, drum/piano/guitar stem separation) doesn't show a price on the site, so you may need to click through checkout to see the real cost. It's also worth comparing directly against LANDR and eMastered, the more established names in AI mastering, before committing to a newer entrant.
Key Features
Prompt-based mastering: Describe the sound you want in plain language instead of manually adjusting mastering plugins.
Automatic signal chain assembly: Detects genre, BPM, and LUFS, then builds a custom chain from modeled analog and digital processors.
Multiple AI engineer profiles: Choose between different named AI "mastering engineers" (e.g., Sophia, Marcus) with distinct sonic styles.
A/B comparison and revisions: Compare mastered output against the original mix and request revisions until it's right.
Loudness and playback simulation: Free tool that previews how a track will sound on Spotify, YouTube, Apple Music, cars, laptops, and phones before release.
Free stem splitting: Basic stem separation and vocal removal included outside the core mastering paywall.
Pricing
Starting price
From ~$4/mo (billed annually); exact current tiers vary, check site
Unlimited (annual): Roughly $4/month billed annually, includes unlimited mastering and stems, all effects, prompt-to-mastering, WAV/HD-WAV/MP3 exports, and 15 revisions per track.
Unlimited Plus: Adds bulk mastering, unlimited revisions, full-length previews, and drum/piano/guitar stem separation; price not publicly listed at time of writing.
Weekly/monthly options: Available for shorter-term use, with pricing shown at checkout rather than on the main pricing page.
Disclaimer: pricing may change, confirm on SoundBoost.ai's own pricing page before buying.
Pros
Fast turnaround: Mastering completes in about a minute per track.
Natural-language control: No need to understand traditional mastering terminology or plugin chains.
Useful free tools: Loudness/playback simulator and basic stem splitting are available without paying.
Privacy-conscious: States it doesn't train models on user masters or share them with third parties.
Cons
Unclear full pricing: Higher "Unlimited Plus" tier doesn't show a public price, making cost comparison harder.
Newer, less proven brand: Less track record than established AI mastering competitors like LANDR.
AI mastering ceiling: Like all AI mastering tools, it can't fully replace a human mastering engineer for complex or unusual mixes.
What Makes It Unique
Streaming playback simulation: Its free loudness and device-simulation tool, which previews how a master will sound on specific streaming platforms and playback devices before release, is a distinctive add-on most AI mastering competitors don't offer.
Kay Score
6.8
/ 10
