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Mastered by Marshal is a professional online audio mastering service provided by Marshal Rosenberger, positioned to turn final mixes into release-ready “records.” It is not an automated AI mastering tool; instead, it is centered on a human engineer, combining an acoustically treated studio, high-end analog gear chains, and digital tools to provide musicians with single-track mastering, stem mastering, album/EP mastering, and one-on-one mastering coaching.
The services are divided into Stereo Mastering, Stem Mastering, and Album / EP Mastering. Stereo mastering is for completed final mixes, with an emphasis on streaming optimization, loudness, clarity, and emotional impact. Deliverables include 24-bit WAV and MP3 files, with a stated turnaround time of 24–48 hours. Stem mastering supports up to 8 stereo stem groups, offering deeper control over elements such as drums, bass, and vocals, with an emphasis on punch, separation, and width. Turnaround is 48–72 hours. The Album/EP option focuses on consistency in tone, loudness, sequencing, and spacing between tracks, and can also provide a DDP Image for CD manufacturing.
Pricing is relatively transparent: stereo mastering is $125 per song, stem mastering is $195 per song, and albums/EPs require a custom quote. A one-on-one 90-minute mastering coaching session costs $499. Payments are processed through Stripe, and payment is required before final files are delivered. One thing to note is that the package pages state that stereo mastering includes up to 2 revisions and stem mastering up to 3 revisions, while the service terms say each service includes 1 free revision. This inconsistency should be confirmed before placing an order.
The strengths are clear service boundaries and explicit copyright terms: after full payment, rights to the mastered deliverables belong to the client, and the service provider does not retain ownership. It also offers educational articles and real-project walkthrough-style coaching, showing a degree of professional transparency. The drawbacks are that the portfolio section shows “coming soon”; although there are client testimonials, there are not enough public A/B listening samples. Refunds are at the service provider’s discretion and are generally not available once work has begun. In addition, the default terms grant permission for work to be displayed in the website portfolio, so if you do not want your audio used for showcasing, you must opt out in writing before submission.
It is suitable for independent musicians, bands, and producers who value human aesthetic judgment and want more detailed control than automated mastering can provide, especially for projects with mature mixes that are ready for official release. The main text does not provide information about access from China, and because it involves third-party services such as Stripe and Sessionwire, actual availability will need to be tested by users themselves.
⚠ This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on masteredbymarshal.com official site.
masteredbymarshal.com is an Unknown Streaming provider. TG4G tracks its product information, with monthly pricing from $125.00, an overall rating of 6.0/10, and a China-accessibility score of Workable. Click "Visit Official Site" to reach masteredbymarshal.com directly.