SoundBoost.ai

SoundBoost.ai is a cloud-based mastering and stem-splitting service for musicians, artists and producers. It is best suited to people who want to steer mastering with prompts and work across web and mobile. The paid Unlimited plan is the practical option for exports and reference mastering; Free cannot finalize or download masters.

Overview

SoundBoost combines a virtual mastering engineer with tools for separating tracks into component stems. Natural-language prompts let users describe the sound they want, while SoundCloud importing can bring in a track directly by link. One subscription works across web, iPhone, iPad and Android, which is useful for people who move between devices.

There is a meaningful gap between trying a project and completing one: Free includes revisions but no finalizing or downloads. That makes it a way to explore the workflow, not a free route to finished masters. Subscribers retain ownership of their music and may monetize their masters. SoundBoost says it does not train its AI on users' audio and does not share music with third parties without consent. Cloud storage lasts while a subscription remains active.

Key features

Prompt mastering gives artists a way to describe desired changes in everyday language, with deep learning and LLM technology behind the virtual engineer. This suits users who want to communicate a sonic direction rather than set technical targets; SoundBoost does not offer loudness targets, so it is less suitable when a specific target is essential.

Reference mastering is included with Unlimited and Unlimited Plus, making paid plans the choice for users who want to work toward a reference track. Stem splitting covers vocals, drums, bass and instruments, and Unlimited Plus adds guitar and piano stems. That combination extends the service beyond final polish, though those extra channels require the higher tier.

Finalized masters can be downloaded as 24-bit WAV or 320 kbps MP3. Supported audio inputs include WAV, MP3, FLAC, AIFF, AAC, ALAC, M4A, OGG and OPUS; video inputs include MP4, MOV, M4V, WEBM, MKV, AVI and 3GP. Free stem-split uploads have no daily or monthly count quota, but each file is limited to 1.5 GB and 22 minutes 30 seconds.

Pricing

Free costs nothing and allows 10 revisions per project, but does not allow finalizing or downloads. It suits someone assessing prompt-based mastering or stem splitting before paying, not anyone who needs deliverable files.

Unlimited costs $48 a year, billed annually ($4.00/month). It includes unlimited mastering and stem splits, 15 revisions per track, reference mastering, and output up to 32 bit, 48000 Hz. It is the clearest fit for regular users who need exports and reference matching without paying for the additional Plus features.

Unlimited Plus has custom pricing. It adds bulk mastering, unlimited revisions, full-length previews, drum separation, piano and guitar stems, and priority queue access. It is aimed at higher-volume workflows or users who need the additional stem channels; its cost should be weighed against those specific needs.

Platforms

SoundBoost is available on Android, iOS and the web, with one subscription covering web, iPhone, iPad and Android. That cross-device access is useful for users who do not want a plan tied to a single platform.

Who it's for

SoundBoost is a sensible choice for musicians, artists and producers seeking online mastering alongside stem separation, especially those who value prompt-based direction, SoundCloud import or mobile access. It is a weaker fit for users who need explicit loudness targets, a downloadable free result, or guitar and piano stems without moving to Plus.

Pros and cons

• Pros: Prompt-guided mastering and reference mastering on paid plans give users two ways to steer results.
• Pros: Stem splitting, SoundCloud link importing and web/mobile access bring several production tasks into one service.
• Pros: Unlimited has no mastering or stem-split count limit and includes 15 revisions per track.
• Cons: Free's 10 revisions per project do not lead to a finalized or downloadable master.
• Cons: Free stem uploads remain subject to a 1.5 GB and 22-minute-30-second per-file cap.
• Cons: Loudness targets are not available, and guitar and piano stems are reserved for Unlimited Plus.

Alternatives

AI Music Mastering Software is the broader category to browse if SoundBoost's particular mix of mastering and stem tools is not the right match.

Choose AI Mastering instead if a free plan with unlimited mastering is the priority; it also supports a wider range of platforms, including desktop systems, API and self-hosting.

Matchering is an alternative for users who want free, GPLv3-licensed open-source software and support for desktop or self-hosted platforms.

TrackGleam suits someone who wants unlimited free mastering with WAV and MP3 output and no watermark or sign-up.

Tunr is an option for users looking for a free mastering tool on macOS or Windows.

AudioMaster.ai is another free option, available on the web for non-commercial use.

Auralith Forge may suit users who prefer one-time payments, with three full-length masters and unlimited 30-second previews on its free tier.

Barichord Audio Lab is worth considering for manual EQ and FX tools, unlimited previews and before-and-after comparison on its free Playground plan.

Free Music Creator AI Mastering is an alternative for web users seeking a broader free tier that also includes limited music generation.

Verdict

Choose SoundBoost if you want prompt-guided mastering, stem splitting and reference matching in a service that spans web and mobile. Unlimited is the straightforward choice for regular exporting at $48.00 per year, while Free is only useful for trying the workflow because it blocks finalizing and downloads. Look elsewhere if you require loudness targets or need finished files without a paid plan.