Frequency State / Music Production Reference Library · Volume 5
Mixing is the process of making separate recorded or programmed parts work together as one piece of music. It involves level, tone, dynamics, space and movement, but the order in which you tackle problems is often more important than the number of plugins you own.
Start with the arrangement and source sounds
Before touching the mixer, listen to the entire piece and decide what should lead in each section. Is the vocal the focus? Is the bassline carrying the main idea? Are the drums meant to feel tight and forward or distant and spacious? A mix becomes easier when these priorities are clear.
If two synthesizer parts occupy the same register and play continuously, reducing one with EQ may not be enough. Simplifying one rhythm, changing an octave or removing a competing layer can improve clarity more naturally than complicated processing.
Organise and gain-check the session
Name tracks clearly, group related elements and identify buses or returns. Check that individual recordings are not clipped and that plugins are not receiving wildly inappropriate input levels. The goal is enough operating headroom, not a compulsory -18 dBFS peak on every track.
Pull down tracks if the master is overloaded, preferably before nonlinear processing stages where necessary. A floating-point DAW may allow higher intermediate peaks, but the eventual output and individual devices still have limits.
Create a static fader balance
Disable or ignore non-essential effects initially and bring up the most important musical element. Add kick, bass and supporting parts gradually, judging how they work together. Use faders to establish the hierarchy and pan controls to provide useful stereo separation.
Listen at a moderate level. A balance that works quietly often reveals masking problems more clearly than one judged only at high volume. Check whether the main melody remains audible when the full arrangement enters.
Solve frequency conflicts with restraint
Once the balance is useful, address specific spectral problems. A high-pass filter may remove unwanted low-frequency rumble from a vocal, while a modest cut on a pad may make space for the bass. Avoid using preset EQ curves on every instrument.
Compare each processed sound in context and bypass the effect occasionally. The mix should get clearer, not merely different. Refer to What Is EQ? for the key filter types and the importance of bandwidth.
Use dynamics only where necessary
Compression can steady changing vocal levels or modify drum transients, but many programmed sounds already have a controlled envelope. If a synth line stays clear without compression, leaving it untreated may be the best option.
Set a compressor’s threshold and timing by listening to the performance, not by copying universal ratio and attack figures. Check the amount of gain reduction and compare bypassed and processed versions at similar loudness.
Make a coherent sense of space
Try one short shared reverb for related instruments and a separate delay for occasional emphasis. Sending several sources into one reverb can make them appear connected, while individual special effects may define a particular part.
Filter reverb or delay returns if their bass or treble competes with important dry sounds. Avoid filling every gap with a long tail: sometimes a small amount of ambience is enough to create depth.
Automation and section transitions
After the static balance is working, automate important changes. Raise a phrase slightly if it disappears behind the chorus, lower a delay return during a busy passage or add reverb at the end of a section.
Automation is part of musical arrangement as well as engineering. One carefully timed effect change can establish a transition more effectively than several constantly active plugins.
Check the complete mix
Listen from start to finish without stopping. Notice any instruments that disappear, transitions that jump in level or effects that linger excessively. Compare on headphones and another familiar playback system if possible, and check mono compatibility.
Leave sufficient headroom for later processing and export a stereo WAV at the intended project sample rate. Listen to the exported file from beginning to end before deciding it is complete.
A repeatable 45-minute exercise
Choose a short project with drums, bass, a pad and a lead melody. Spend the first ten minutes on arrangement and track organisation, the next fifteen on volume and panning, ten on specific EQ or compression fixes, and ten on space, automation and export.
Write down three audible improvements, not three plugins used. If a session sounds no better after a processing stage, remove or reconsider it. This establishes a decision-making method you can reuse across styles.
Continue reading
This walkthrough builds on Gain Staging Explained, Compression, EQ and Stereo vs Mono. For troubleshooting, continue to Common Mixing Mistakes.