Gain
Control for the input level of a channel.
Detailed explanation
Gain sets the input sensitivity of a channel — before the channel fader. You use it for level matching: tracks are mastered at different loudness. Gain brings track B to the same level as track A before you make the transition. Without level matching you get audible jumps in volume during the blend. Club mixers and larger controllers have a dedicated knob per channel for this; the DDJ-FLX2 has none, so you set the level in rekordbox.
Sources (2)
- rekordbox Instruction ManualPrimary sourceAlphaTheta Corporation·Manufacturer·2026-07-06·retrieved 04.08.2026
Version 7.2.16, 265 pages, in English — full text in the archive. Menu paths and feature set can change with every update. ⚠️ A complete GERMAN edition of the 7.x manual does not exist — in German there is only a 30-page introduction to 7.2.14. Waiting for it was waiting for something that isn't there. Current software on 10.08.2026: 7.2.17 (30.07.2026).
- DDJ-FLX2 — Produktseite (Features & Spezifikationen)Primary sourceAlphaTheta Corporation·Manufacturer·retrieved 03.08.2026
Evidence for the mixer's controls: EQ knobs, channel faders, crossfader — NO gain/trim knob, no dedicated loop in/out buttons (loops run via the performance pads).
In practice
The new track comes in noticeably quieter than the one playing, even though the fader is all the way up. The reason is gain: every track is mastered at a different level. You match that before you mix, not in the middle — otherwise you are correcting volume in the same moment you are making the transition, and the room hears both. As a rule of thumb the level meters on the mixer serve you better than the feeling in your headphones.
Assessment by the DJLearn editorial team — experience, not a sourced factual claim.
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