RoEx is a London-based audio-technology company, spun out of Queen Mary University of London, that uses AI to automate professional mixing and mastering. Its core insight is that high-quality mixing and mastering have traditionally required expensive engineers and studio time, putting them out of reach for many independent artists and creators. RoEx packages studio-grade signal processing and machine learning into tools that deliver polished results in minutes, democratizing a craft that has long been a bottleneck in music production.
The company's product suite addresses the production workflow end to end. Automix automatically mixes and masters multitrack stems, balancing levels, applying processing, and delivering a release-ready master. Mix Check Studio analyzes a track and provides detailed, actionable feedback on the quality of a mix, helping creators learn and improve rather than simply handing back a black-box result. Together these tools serve both creators who want a finished product and those who want guidance on their own mixes.
RoEx also offers Tonn, a professional-grade API that lets developers and enterprises embed its mixing and mastering capabilities into their own platforms. This B2B angle expands RoEx's reach beyond individual creators to distributors, DAWs, and creator tools that want to offer automated audio production as a feature. A partnership with UnitedMasters, which tapped RoEx to provide AI-powered mastering to independent artists, exemplifies this platform strategy, and the company reports its technology has been used to improve over a million tracks.
RoEx has raised around $1.12 million, including a pre-seed round backed by Haatch Ventures and Queen Mary University of London, plus a £250,000 grant from Innovate UK awarded through its Creative Catalyst: AI in the Music Industry competition to develop its ProStyle model. Combining academic research roots with a practical, creator-facing product line, RoEx competes with established AI-mastering services while differentiating through its analysis tools, developer API, and university-backed R&D.