Hardware & signal path
Channel fader
A channel fader is the vertical level control for one deck. The crossfader chooses between two sources; the channel faders decide how much of each is in the room, which is where most club mixing actually happens.
In practice
Set the level with the gain, then use the fader for the move — never the other way round.
Get both channels reading roughly the same on the meters with their faders at the same height, then leave the gain alone. That way a fader at three-quarters means the same thing on both decks and the blend is a symmetric move rather than a guess. If you find yourself running one fader at the top and the other halfway, that is a gain-staging problem wearing a fader’s clothes — and it is measurable: across the transitions DJs actually build here, one in ten joins two records three decibels or more apart.
Gain first
What sets the level
Fader second
What performs the move
Same height, same level
What good staging looks like
Where these come from: Gain-staging practice; the one-in-ten figure is the catalog measurement published on gain normalisation, over 7,250 hand-sequenced transitions. For what we can measure, see how far levels actually differ.
Why it matters
It is the control with the most resolution under your hand. A long throw means a single decibel is a visible distance, so the small corrections that make a blend disappear are physically possible in a way a knob rarely allows.
It is also the wrong place to fix a level mismatch. The fader is a performance control; the gain sets the level the fader is working within, and using the fader to compensate for a quiet record leaves you with no travel left for the actual move.
Frequently asked
What is the difference between gain and the channel fader?+
Gain sets the level arriving at the channel; the fader controls how much of it goes to the master. Gain is a setup control, the fader is a performance control.
Should channel faders be at the top?+
Somewhere below the top, so you have travel in both directions. Running everything at maximum means the only move left is downwards, and it usually indicates the gain is set too low.
Why does my mix jump in volume?+
Usually because the two records are mastered at different levels and the gain was not matched first. Half of real transitions need under a decibel of correction; one in ten needs three or more.
Related terms
Crossfader
The crossfader is the horizontal fader that blends between two channels. At one end you hear only the left assignment, at the other only the right, and a curve control sets how abruptly the handover happens in between.
Gain
Gain sets how hot a track arrives at the channel before anything else touches it. It is a correction for how the record was mastered, not a volume control for the room.
Headroom
Headroom is the gap between where your signal is sitting and the point where it distorts. It is the room left for the loud parts, and for whatever you do to the channel next.
Gain normalisation
Gain normalisation sets every track to the same measured loudness automatically, so a quiet record and a loud one arrive at the channel matched. It corrects for mastering, not for how hard a record hits.
Explore: Gain normalisation · Mixing guides · Score a transition · All DJ terms