SoundBoost.ai

SoundBoost.ai is an online mastering and stem-splitting tool for musicians and producers who want to guide a master with natural-language prompts. It is strongest for creators who also need stems or reference matching; the free plan allows revisions but not finished downloads.

Overview

SoundBoost combines a virtual mastering engineer with tools for separating a track into component parts. Prompt-led control gives users a way to describe the sound they want rather than setting loudness targets, which the service does not offer. Its appeal is breadth across web and mobile, while the free tier stops short of delivering an exportable master.

Key features

Users can describe desired changes in everyday language, with deep learning and LLM technology behind the mastering process. That suits artists who prefer to steer sound by description; those who need to specify a loudness target should look elsewhere.

Reference mastering is included in Unlimited and Unlimited Plus, making those tiers the fit for work guided by a chosen track. Stem splitting covers vocals, drums, bass, and instruments; Unlimited Plus adds guitar and piano stems. The broader separation options are useful for producers, but the extra channels are reserved for the more advanced plan.

Finished masters can be exported as 24-bit WAV or 320 kbps MP3. SoundCloud importing allows tracks to be brought in by link. 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. That makes the free stem tool practical for repeated smaller jobs, not unrestricted long-form files. SoundBoost says it does not train its AI on users' audio or share music with third parties without consent. Users retain ownership and may monetize masters; cloud storage lasts while a subscription remains active.

Pricing

Free: free. The plan gives 10 revisions per project, but no finalizing or downloads. It can suit someone evaluating the revision workflow or using stem splitting within its file limits, but it cannot serve as a free export route.

Unlimited: $48 a year (billed $48.00 per year (= $4.00/month, billed annually)). It includes unlimited mastering and stem splits, 15 revisions per track, reference mastering, and output up to 32 bit, 48000 Hz. The annual commitment is the key tradeoff; this is the practical tier for regular users who need downloadable masters and reference matching.

Unlimited Plus: custom pricing. It adds bulk mastering, unlimited revisions, full-length previews, a priority queue, and drum separation plus piano and guitar stems. It is aimed at higher-volume or more detailed production workflows; its custom pricing makes it less straightforward to compare with the fixed annual plan.

One subscription works across web, iPhone, iPad, and Android. Support is available by email at [email protected].

Platforms

SoundBoost runs on web, Android, and iOS, with a single subscription spanning web, iPhone, iPad, and Android. That flexibility benefits users moving between desktop browser and mobile devices without buying separate access.

Who it's for

SoundBoost is best for musicians, artists, and producers who want prompt-guided mastering alongside stem separation, especially if reference matching or mobile access matters. It is a weaker fit for anyone who needs free final downloads, explicit loudness targets, or predictable per-month billing rather than an annual charge.

Pros and cons

• Pro: Prompt-led mastering and reference matching combine creative direction with a reference-based workflow on paid plans.
• Pro: Stem splitting includes core parts on the lower tiers and guitar and piano channels on Unlimited Plus.
• Pro: The free stem upload count is uncapped by day or month, making it useful for repeated smaller files.
• Con: Free users cannot finalize or download masters, so exporting requires a paid plan.
• Con: The $48.00 annual Unlimited price requires paying by the year, and the free stem file cap excludes larger or longer uploads.
• Con: There are no loudness targets for users who need that control.

Alternatives

AI Music Mastering Software is the category list for comparing more options.

Choose AI Mastering if a free plan with unlimited mastering or broader platform coverage, including desktop and API options, matters more than SoundBoost's stem tools.

Matchering is the alternative for users who want free open-source software under GPLv3, with no paid plans.

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

SongUp AI is an option for web users seeking free song creation credits and a paid Pro tier, rather than a mastering-and-stems workflow.

Auralith Forge is worth considering for web users who prefer one-time master purchases and a limited free set of full-length masters.

Free Music Creator AI Mastering is another web-based freemium option, combining capped monthly song processing with music generation.

HanoLab Mastering may suit users who prefer API access alongside the web and a credit-based monthly free tier.

MasterForge is another freemium web option for users comparing AI mastering services.

Verdict

SoundBoost.ai is a strong fit for musicians and producers who want prompt-directed mastering, stem separation, and reference matching in one cross-platform subscription. Unlimited is the clearest choice for regular exporting, while Free is useful only for revisions and bounded stem work; look elsewhere if no-cost finished downloads or loudness-target control is essential.