Case Study: Fixing Vocal Compression Clicks and Plugin Order

The Challenge

A client was experiencing one of the most maddening issues in music production and booked a Live Diagnostic. He had captured a brilliant vocal performance in Logic Pro—the tone was rich and the delivery was perfect. However, as he built his mix, a subtle but persistent ‘clicking’ or ‘swooshing’ noise appeared at the very beginning of each sung phrase. He scrutinised the raw audio files and confirmed they were completely clean; the noise was being introduced somewhere in his digital processing chain, but the source was a total mystery.

What I did

We connected remotely, and using the Audiomovers LISTENTO plugin, I was able to listen to his high-resolution Logic Pro playback through my own studio monitors. My first port of call in these situations is always to investigate the signal path. I examined his vocal plugin chain and immediately spotted the culprit: it wasn’t a faulty plugin, but the order of operations.

• Diagnosing the Chain: His signal was flowing like this: EQ -> Saturation (Tape Emulation) -> Saturation (ChromaVerb) -> Compressor (LA-2A Emulation).
• The Root Cause: Every recording has a microscopic ‘noise floor’ (room tone and electronic hiss). Saturation plugins add harmonic richness, but they also pull that background noise floor up to the surface. The compressor at the end of the chain had a slight attack delay (around 30 milliseconds). For that tiny fraction of a second before the compressor clamped down, we were hearing the super-charged, saturated noise floor at full volume. The sudden gain reduction is what created the audible “click” or “swoosh”.
• Re-ordering the Signal Flow: The fix was elegant and immediate. This wasn’t a case of buying better plugins; it was purely about logical order. We needed to control the dynamics before we enhanced the harmonics. We dragged and dropped the compressor to sit right after the initial corrective EQ, but before any of the saturation effects.

The Result

By simply correcting the plugin order, the problem vanished instantly. The compressor was now acting on a clean signal with a natural noise floor, before the saturation could lift it. The subsequent saturation stages then enriched a vocal that was already dynamically consistent. The client was left with a smooth, warm vocal completely free of distracting digital artefacts, and a valuable lesson in the “dynamics first, colour later” philosophy.