How to Mix Two Tracks Correctly.

How to Mix Two Tracks Correctly

What mixing well means

A well-executed mix meets three conditions. Failure in any one makes it noticeable:

1. You cannot hear the join. The audience does not perceive the exact moment one track started and the other stopped.
2. Energy is maintained. Moving between tracks does not break the dance floor’s pulse or sense of continuity.
3. The transition serves a purpose. It may be a smooth change, a burst of energy or an elegant exit. It cannot simply be a routine task.

That third point involves judgement. You can technically join two tracks flawlessly without mixing well, because mixing is a musical decision as well as a procedure.

The four alignments

This framework organises everything else. It is a working framework rather than a theorem: it helps you identify which part of a mix is failing when something sounds wrong.

• Tempo. Both tracks run at the same speed. Adjust it with the deck’s pitch control or Sync.

• Phase. Beats fall in the same place. Tracks at the same tempo can be half a beat apart and sound like double hits. Correct this manually with the jog or a Sync mode that also aligns phase.

  These first two steps are beatmatching, with their own procedure in How to Beatmatch Manually, Step by Step. Be precise about terminology here, because each application uses its own. Traktor’s manual describes two modes: BeatSync maintains tempo and phase, while TempoSync locks tempo but not phase, allowing offsets during transport operations. The rekordbox manual describes BEAT SYNC as synchronising BPM and beat position with the sync master track, and requires files to be analysed beforehand to obtain grid information.

• Structure. Section changes coincide. This is what ruins most mixes and receives the least practice, because no button fixes it: you decide where to enter. Its own technique is developed in What Phrasing Is and How to Mix by Phrases.

• Level and frequencies. The tracks sum without overloading or duplicating content. This is where trim, the fader and EQ come in.

Before you play: preparation

You set up a successful mix before raising the first fader. Preparation consists of three specific tasks:

1. Map the incoming track. Find where the intro ends, where the kick enters and where the first major change occurs. Note these in relative bars, not minutes.
2. Choose entry and exit points. Decide which section of the playing track should coincide with which section of the incoming one.
3. Mark the points. Put cues at actual changes, not where the grid says they should be.

Keep the counting unit in mind: one bar contains four beats, and much dance music groups sections in multiples of 4, 8 or 16 bars. Do not turn that observation into a law: there is no universal definition saying a phrase is 8 bars. Eight bars is a very common grouping, not a rule; tracks can have blocks of 4, 12 or 24 bars.

The procedure, step by step

This order works, and each step assumes the previous one is complete.

1. Cue the incoming track. First listen on headphones with the channel’s CUE enabled. This is exactly what headphones are for: preparing the transition without the audience hearing it. The full procedure is in Cueing and CUE.
2. Match tempo. Adjust pitch until both tracks run at the same speed.
3. Match phase. Correct the offset until the kicks sound like one. If they gallop, stop: no EQ can fix galloping beats.
4. Choose the entry point. Enter at a phrase boundary. Count backwards from that boundary to avoid being late.
5. Set the level before raising the fader. Use trim, not the fader. Raising the fader to match levels is the mistake that makes everything sound overloaded later.
6. Raise the incoming track gradually. Use its channel fader, or the crossfader if your style calls for it.
7. Perform the bass swap. As soon as both tracks are audible, decide which carries the bass and remove it from the other.
8. Hand the lead to the incoming track. Gradually lower the outgoing track, section by section.
9. Finish at a phrase boundary. Once the outgoing track contributes nothing more, lower it completely and leave the remaining track clear.

Step 9 is often forgotten: many good transitions fall apart in the final bars when the outgoing track trails on with percussion or vocal remnants that no longer fit.

The bass swap

As soon as both tracks play together, bass content becomes the first problem. Two simultaneous basslines rarely add constructively: they muddy each other, compete and steal energy from the whole. The most widespread practice is to remove the incoming track’s bass before raising it, then restore it as you remove bass from the outgoing track.

Traktor’s manual explicitly describes this in its section on EQ during a transition: before starting, turn the incoming channel’s LOW knob to minimum to remove its bass frequencies. The same manual documents each channel EQ adjusting high, mid and low frequencies, with EQ Kill buttons to remove a band completely and immediately.

The procedure is documented, but the fine detail—how long, which bar, how smoothly—is judgement. It is developed in detail in How to Swap the Bass Between Two Tracks Without Muddying the Mix.

How long a transition lasts

There is no prescribed duration. Anyone giving you an exact figure is offering a convention, not a rule.

What you can say is:

• Structure determines duration. If the incoming intro lasts 32 bars, an 8-bar mix stops halfway; if it lasts 4 bars, a 64-bar mix requires improvisation.
• In dance music, you normally think in blocks of 8, 16 or 32 bars and build transitions across several blocks.
• Context takes precedence. A warm-up set gives you time for long mixes; at peak time, a well-placed eight-bar transition may work better than thirty-two bars of lukewarm overlap.

Practice heuristic: if you do not know how long your transition will last, make it a whole number of bar blocks. Starting at one phrase boundary and finishing at another halves the risk of a mismatched mix.

Transition types

These are the three patterns used most often, each with its own context:

• Long mix. Both tracks coexist for several blocks as one rises and the other falls. It is the default in 4/4 dance music because tracks usually have intros and outros designed for it.
• Bass swap. A long-mix variant focused on frequency content. It rescues mixes between tracks with substantial bass weight.
• Quick cut. No overlap: hand over at a phrase boundary. It works for changes in style, energy or tempo and has its own guide in How to Change Tracks Without Mixing.

Manufacturers also document preparing a mix as a pair of points. Rekordbox describes a MIX POINT LINK workflow pairing one track’s exit point with another’s entry point—selected from Hot Cues or Memory Cues—and automatically starting the second track when the first reaches that point. This is the same planned alignment executed by software: you choose which sections to pair, and the machine executes the timing. The official FAQ notes that BEAT SYNC must be enabled to use SYNC in this workflow.

How to tell whether you are doing it well

Poorly executed transitions have recognisable symptoms, almost none of which concern tempo:

• Nothing gallops or clashes harmonically, but it sounds cluttered for a few seconds when one track changes section and the other does not. This is a structural problem.
• The summed volume suddenly jumps. This is a level problem: two summed tracks always produce more than one.
• The bass becomes a solid mass. This is a frequency-distribution problem.
• You hear the join. This usually means a phase problem or an entry outside the phrase.

The positive indicator is harder to describe and easier to hear: the music keeps moving. There is no moment when the audience looks towards the DJ; the track changes without anyone noticing.

Common mistakes

“If it is synchronised, it is already mixed.” Sync solves tempo and, depending on the mode, phase. Neither is structure, where most bad-sounding mixes fail.

Raising the fader before setting the level. Set the level with trim before raising it. The rekordbox manual warns about excessive level: clipping is likely during mixing or effects processing; the limiter prevents distortion at the cost of damaging the sound’s attack.

Always mixing with Sync and an uncorrected grid. The rekordbox manual makes prior file analysis a condition for BEAT SYNC to obtain grid information. Sync on a bad grid precisely aligns two false references.

Entering halfway through a phrase. This is the costliest mistake and hardest to correct live. Avoid it by preparing points before playing.

Not cueing. Raising a track you have not heard on headphones means giving up the chance to know whether it matches, where it changes and what level it has.

Leaving the outgoing track playing too long. Finishing on time is part of mixing. Out-of-place percussion can undo in four bars what you built in sixty.