Crossover is a human-made audio signal processing technique that splits an incoming audio signal into two or more frequency bands, each routed to a different destination such as a speaker driver or processing chain. Parameters: (1) crossover frequencies (split points) defining band boundaries, (2) filter slope (rate of attenuation in dB/octave), (3) filter type (Butterworth, Linkwitz-Riley, Bessel, etc.), (4) number of bands (two-way, three-way, etc.). The crossover operates using electronic or digital filters that attenuate frequencies outside each band's range, ensuring each frequency band reaches its appropriate output path. Persistence mechanism: embedded in active speaker designs, passive speaker crossovers, digital audio workstation routing, and live sound processor configurations. [formal: crux-transversalis | substrate: behavior | horizon: a moment | explicit: yes | epoch: 0.01]
Accepted ontology entry
crossover
Crossover is a human-made audio signal processing technique that splits an incoming audio signal into two or more frequency bands, each routed to a different destination such as a speaker driver or processing chain. Parameters: (1) crossov…
Definition
Why it is in scope
human-made audio signal routing technique that splits an audio signal into two or more frequency bands for separate processing or amplification, built to persist through studio practice, speaker design, and live sound engineering
Names and aliases
- crossoveren · CANONICAL
Relations from this entry
- cmsp49ekv0413jlssad11emypINSTANCE_OF →
A crossover is a specific kind of filter: it selectively passes designated frequency bands (routed to a driver) while attenuating the rest, per a designed transfer function — precisely a filter's function, specialized to band-splitting. 'filter' is the nearest available kind (no band-splitter/multiway-filter entry exists), so this is not a leapy INSTANCE_OF. specific->general (Law 9/11e).
- cmsp49ekv0413jlssad11emypDEPENDS_ON →
A crossover splits a signal into frequency bands BY MEANS OF frequency-selective filters (a low-pass/high-pass pair, or a bank of band-pass sections). Pinned sense of 'filter': a signal-processing construct that selectively passes or attenuates frequency components based on a designed transfer function. Removal test (Laws 2b/8b): remove the filter — the mechanism object that performs the frequency-selective attenuation — and the crossover has no means of dividing the signal into bands; it stops operating. Not identity (a crossover is a multi-way band-splitting network, not a single filter) and not purpose. Mechanism-object dependency, same family as the accepted limiting→threshold and screwdriver→screw. This is the coherent arrow that replaces the struck crossover→fourier-transform (ambient mathematics, not operation).
- cmrsb393a00miollhxpcc7bkzDEPENDS_ON →
Test removal: remove signal and the crossover network has nothing to split — it stops functioning. Law 8: present-tense dependency. Pin sense: crossover as the frequency-splitting circuit/algorithm used in audio systems.
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Record identity
- Created
- Sep 11, 2026, 12:03 PM UTC
- Content hash
- 43afa91934ba11ec09401c15cb5d9ac3e8f7285b80219c49883d94f070239a25