Matt Colton a deep conversation on Mastering, Vinyl Lathes, and the Chord Electronics Alto Headphone Amplifier

In an exclusive studio interview at London’s legendary Metropolis Studios, acclaimed mastering engineer Matt Colton sits down to discuss the art and technical craft of record mastering, the irreplaceable magic of cutting vinyl on a Neumann lathe, and how the Chord Electronics Alto headphone amplifier has fundamentally transformed his workflow.

From Porky’s to Metropolis: The Evolution of a Mastering Career

Having started his career in 1997 as an intern at Porky’s Mastering in Soho under George "Porky" Peckham, Colton’s journey spans decades across landmark UK studios including Optimum Mastering, Fluid Mastering, Air Studios (mentored by Ray Staff), and Alchemy Soho.

Reflecting on his trajectory, Colton notes that a defining turning point occurred roughly ten years into his career:

• Shifting Perspectives: While early understanding centered purely on timing and transient arrival at the ear, mentorship under Ray Staff opened his eyes to the profound influence of texture, timbre, and hardware differences (such as how a 1 dB boost at 400 Hz sounds radically different across distinct equalizers or converters).
• The Metropolis Environment: Operating out of Metropolis Studios, housed in a massive, historic Victorian power station in London, provides an inspiring and challenging backdrop alongside top-tier peers, keeping benchmarks exceptionally high.

The Dual Nature of Mastering: Art Meets Technical Precision

Mastering serves as the final creative and technical gatekeeper before a recording meets the world:

• The Creative Goal: Acting much like framing and lighting a painting, mastering aligns the sonics with the emotional core of the performance, ensuring a cohesive narrative flow across an album and optimizing tracks to translate powerfully across streaming playlists.
• The Technical Reality: Preparing compliant masters for various physical and digital mediums, including streaming platforms, CDs, cassettes, and vinyl production.

Cutting Vinyl on the Neumann Lathe

Operating a Neumann VMS 80 lathe remains one of Colton’s favorite daily rituals. Having cut thousands of sides throughout his career, he explains the unique joy of the process:

• The Acetate Advantage: Cutting test acetates allows engineers to evaluate the uncompressed purity of the cutting system directly on various turntables before mass manufacturing introduces noise-floor elevation.
• Tangible Finality: Eschewing purely digital workflows, cutting a physical groove transforms waveforms on a screen into a tangible, permanent piece of recorded art, signed traditionally with his hallmark "Matt at Metropolis".

The Chord Electronics Alto: A Paradigm Shift for Studio Reference

Transitioning from long-term reliance on portable solutions like the original Hugo and Hugo 2, Colton details his experience integrating the Chord Electronics Alto desktop headphone amplifier into his mastering setup:

• Studio-Grade Headroom & Transients: The Alto delivers immense headroom, razor-sharp transient response, and a dead-silent noise floor that allows long listening sessions without ear fatigue.
• Speaker-Like Immersion: Paired with high-end planar magnetic headphones (such as Audeze models), the amplifier recreates a soundstage that feels less like traditional headphone listening and more like sitting directly in front of studio monitors.
• Workflow Transformation: The Alto has successfully slowed down Colton's front-end decision-making process by providing a hyper-detailed, deeply musical reference that he now relies on alongside main and nearfield monitors.

"The Alto has changed the way that I work... It's super detailed, but it still sounds rich and musical. It's not soulless or clinical; it still has the magic in it. You dropped it off, and I'm not giving it back." — Matt Colton