The company has recruited mastering engineers Noel Summerville, Mazen Murad and Frank Arkwright and appointed Yvonne Zimmerling as mastering manager.

Metropolis Group managing director Laura Traill says: "In times when the mastering studios are suffering I am delighted to say we have been able to improve the depth of talent available to our clients."

Summerville joins Metropolis from Transfermation to create 'Transfermation at Metropolis', a new mastering service. He worked with Metropolis's John Goldstraw and Crispin Murray to build a ...