The short guide
Understand the idea
DJ EQ mixing uses frequency controls to shape how two tracks overlap. A bass swap transfers low-frequency emphasis from one part to the other. Here each deck’s drums, bass and chords pass through a real low-shelf filter centered around 180 Hz.
What you can explore
- Distinguish the deck blend from a low-frequency EQ adjustment.
- Reduce the incoming lows before transferring low-frequency emphasis.
- Compare the saved EQ settings with either part alone or both together.
A worked example
Bring B in with reduced lows, then swap
Leave A’s low EQ at 0 dB and reduce B’s to −18 dB. With Play uses set to Both decks, keep the blend near the middle. Try the handover preset that keeps B’s lows: A changes to −18 dB and B returns to 0 dB. Compare that state with the opposite low-end emphasis.
- Incoming B
- −18 dB reduces its low shelf while leaving the whole part present.
- Deck blend
- 50% toward B keeps both deck gains in the blend; it is separate from the EQ setting.
- Bass handover
- A at −18 dB and B at 0 dB transfers the neutral low shelf to B.
Change a frequency region, not the whole part
Production EQ explores filter shapes on one pad. Here the goal is a low-end handover between two synchronized parts. The deck blend scales each entire part. The low EQ changes a frequency region using a low-shelf filter. In this lesson, 0 dB is neutral and negative values reduce the shelf. The filter also affects low-frequency energy in the drums and chords; it does not detect or remove an isolated bass stem.
Start by reducing B’s lows while A stays neutral. Keep the timing and blend the same so the filter change is easier to compare. A reduction of −18 dB is substantial, but it is not a mute or a hard boundary at 180 Hz. The filter response changes gradually around its turnover region.
Give the low end somewhere to go
Two prominent bass parts can compete. One practical transition approach is to introduce the incoming part with reduced lows, reduce the outgoing lows and bring the incoming lows back. The two handover presets let you compare those EQ states without moving several controls one at a time.
This exercise saves a current balance rather than a timed recording of a bass swap. The displayed dB values are actual filter settings, not measured bass energy, headroom or speaker output. Which state works musically depends on the sounds, rhythm and surrounding mix.
Listen deliberately and keep the context clear
Play uses selects A solo, Both decks or B solo. Solo changes which deck is heard; the blend is used for Both decks. If one part is silent, changing its EQ cannot make that part audible until the listening selection or blend brings it back. These comparisons are not loudness matched.
Phone speakers may reveal little low bass, so the exact filter settings and written feedback remain available in quiet mode. The four-bar original example uses 120 BPM. Review your current choices to finish and download a text recipe. No club-mixer calibration, audio export or automatic app transfer is implied.
Common questions
What is a bass swap in DJ mixing?
It is a low-end handover between two tracks. One common approach reduces the incoming lows, brings that track in, then reduces the outgoing lows while restoring the incoming lows.
Does −18 dB turn the bass off?
No. It reduces the low-shelf filter gain. This is not a mute, a hard cutoff or an isolated bass-stem removal; the filter changes a frequency region gradually.
Why does changing B’s EQ sometimes sound unchanged?
Check Play uses and the blend. B is silent in A solo or when Both decks has a blend of 0% toward B. Its filter setting still saves, but you must bring B into the audible selection to compare it.
Is there one correct EQ balance for a transition?
No. The source material and the musical context decide what fits. The lesson describes your actual settings and lets you review any valid balance without awarding a sound-quality score.
Published by TunePal. Interactive examples for beginner music producers.