Gain staging without guessing
Give every plugin the level it was designed for, keep some headroom, and the whole chain behaves. Here's why levels matter more than they look — and a simple way to get them right.
In a modern DAW it’s tempting to ignore levels — the mix bus is 32-bit float, so a channel can run “over 0” internally and nothing clips. So why does gain staging still matter?
Two reasons: the places where float stops protecting you, and the plugins that care how hard you hit them.
Where headroom actually runs out
The internal mixer has effectively unlimited headroom, but the signal eventually meets things that don’t:
- The master output and export. When the mix leaves the float world — a fixed-point export, the converter feeding your speakers, a limiter — anything above 0 dBFS clips. 0 dBFS is the absolute ceiling in digital; cross it and you get hard, ugly distortion, not analog warmth.
- Plugins that clip internally. Plenty of processors, especially analog-modeled ones, have their own internal ceiling. Slam them and they distort regardless of the float bus around them.
So keep a few dB of headroom on the master — peaks comfortably under 0, around −6 dBFS — so the mastering stage has room to work.
The plugins that care: analog models
This is the real reason gain staging matters today. Analog-modeled plugins are level-dependent. A tape emulation, a console channel, a saturator, an opto compressor — they’re calibrated to a sweet spot and behave differently depending on how hard you drive them. Too hot and they distort or over-compress; too quiet and they barely do anything.
Most are calibrated around a reference level borrowed from the analog world, where 0 VU meets a fixed point on the digital scale:
- −18 dBFS = 0 VU — the EBU R68 alignment used across Europe, or
- −20 dBFS = 0 VU — the SMPTE standard used in the US.
Many popular analog-modeled plugins sit at a nominal −18 dBFS internally. So if your track’s average level lands roughly around there, the plugin “sees” what it was designed for.
Peak vs average — aim the right one
Here’s the catch people miss: a level-dependent plugin reacts to the average level, not the peaks. A snare can peak at −3 dBFS while averaging −20. So:
- Watch peaks to avoid clipping.
- Watch average level (an RMS or LUFS reading) to drive analog-style plugins into their sweet spot.
A simple, repeatable method
- Trim at the start of the chain, not with the fader. The channel fader sits after your inserts, so it doesn’t change the level going into them. Put a gain/utility plugin first and set the level there.
- Get each track peaking around −12 to −6 dBFS, or averaging near −18 dBFS if you’re feeding analog-modeled processors.
- Leave the master with headroom — peaks under −6 dBFS — so mixing into a limiter later isn’t a fight.
Gain staging isn’t a magic number. It’s giving each processor a level it was built for, and keeping enough headroom that nothing clips by surprise.