On Compression Philosophy – A Conversation with Tone Projects

Compression is often discussed in terms of loudness and gain reduction.

In mastering, it is something else entirely.

Last week I published an in-depth analysis of the Tone Projects Unisum mastering compressor, exploring how time constants, detector behaviour and envelope shaping translate into audible results in electronic music mastering.

Rather than focusing on presets or “how to get louder,” the video examines how compression affects:

– transient integrity– low-end stability– crest factor management– perceived depth and forwardness– long-term musical tension

While working on the video, I had the pleasure of exchanging with Rune Lund-Hermansen, developer at Tone Projects, about compression philosophy and creative control.

What makes a modern mastering compressor interesting is not emulation, but behaviour.

Unisum, for example, allows precise control over detection modes, time constant interaction and dynamic response curves. This flexibility means the compressor can either behave transparently — preserving micro-dynamics and stereo depth — or actively sculpt density and punch in a deliberate, musical way.

In club-focused electronic music, these nuances matter.

A 0.5 dB change in gain reduction timing can alter how a kick translates on large systems. A slight shift in release behaviour can change the perceived groove. The interaction between detector topology and low-frequency energy directly impacts phase perception and spatial solidity.

Compression, at mastering level, is not about control. It is about shaping intention through time.

Conversations between developers and engineers are important because they reveal the thinking behind the tools we rely on. Understanding the architecture behind a mastering compressor deepens the way we use it.

For those interested in the full breakdown of the Unisum mastering compressor and its role in modern mastering workflows, the complete video is available here:

https://www.youtube.com/watch?v=pmhGFUtiQLQ