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Message: [QUOTE="Queen, post: 90643, member: 27"] Auditory masking occurs when one sound reduces your ability to hear another, especially when their energy sits close together in frequency. In a mix, that can make a vocal lose consonants, bury a bass note under a kick, or turn two clear instruments into one indistinct mass. The important bit is that overlap alone does not prove you have a problem. Most musical sounds are broadband, so guitars, vocals, drums, keys, and synths routinely share large parts of the spectrum without becoming unintelligible. You need to hear whether one element is actually obscuring another at the moment both are active. [HEADING=2]Critical bands explain why nearby energy competes[/HEADING] Human hearing does not resolve every hertz as a separate lane. The auditory system groups nearby frequencies through overlapping auditory filters, commonly described with critical bands, and the Bark scale expresses that frequency selectivity in perceptual units. Energy landing inside or near the same auditory region can therefore compete more strongly than energy spaced farther apart. That is why [B]frequency masking between musical parts[/B] is more useful to think about perceptually than as two analyzer curves touching. A bass guitar and kick can overlap heavily below 150 Hz yet remain readable if their envelopes, levels, harmonics, and arrangement keep their identities distinct. A smaller overlap can be more troublesome when one sound is much stronger right where another carries information you need to hear. Masking is also asymmetric. Stronger low-frequency content can spread its masking effect upward, which matters when dense low mids begin clouding detail above them. The practical lesson is not to carve every shared band into separate territories, but to identify which source is dominating a perceptually important region and whether that dominance is actually hurting the mix. [HEADING=2]Time changes whether spectral overlap matters[/HEADING] A static spectrum hides one of the biggest variables because music moves. Two stems may occupy the same frequency region across an entire song while rarely producing their strongest energy at the same instant. If their peaks alternate, the ear gets repeated chances to separate them. This is where a [B][URL='https://goldmidi.com/community/threads/kirin-mastering-debuted-kirin-os-1-0-for-audio-audits.76005/']time and frequency masking view[/URL][/B] becomes useful without turning overlap into a verdict. Kirin OS displays overlap between multiple files across time and frequency bands, so the useful question is where the collision occurs, not merely whether the stems share frequencies. You still have to listen at that moment and decide whether anything important disappeared. Psychoacoustics also recognizes temporal masking, where a strong sound can affect perception of another sound arriving just before or after it. In ordinary mixing, you do not need to calculate laboratory thresholds to benefit from the idea. A huge snare transient, bright percussion hit, or dense synth attack can briefly make nearby detail harder to perceive even when a long-term analyzer view looks harmless. That makes short, repeatable listening passes more valuable than staring at an averaged spectrum. Loop the phrase where intelligibility drops, mute one suspected source, then bring it back at the same level. If the missing detail suddenly becomes obvious, you have evidence of a perceptual conflict rather than just a colorful display. [HEADING=2]Fix the masking source instead of chasing the graph[/HEADING] EQ is one option, but it is not the automatic answer to how to fix frequency masking. Sometimes the cleaner move is lowering the competing part, shortening its sustain, changing an arrangement, moving an octave, editing a noisy layer, or using dynamic processing only when the collision occurs. Those choices preserve tone when permanent EQ would solve a problem that exists for half a second. Vocals make the distinction obvious. A singer can disappear only when a guitar phrase, cymbal wash, or keyboard layer becomes busy, so a fixed cut across the whole track may leave the accompaniment unnecessarily thin elsewhere. Dynamic EQ, automation, or a small arrangement change can instead target the actual collision. The same discipline applies to bass and kick masking. Before cutting either source, decide what you are trying to preserve at the troublesome moment: the kick's attack, the bass fundamental, note definition, or low-end weight. Then make the smallest move that restores that cue and check the result in context. Visual masking tools are best treated as locators. They can narrow a three-minute song down to a few suspicious moments and frequency regions, but they cannot decide which overlap is musically intentional or whether the listener needs both elements to remain equally exposed. Your ears make that call, and the time axis tells you where to listen. [/QUOTE]

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