Frequency Spectrum — What It Means in Music Production
The frequency spectrum is the full range of audible frequencies in an audio signal, spanning from approximately 20 Hz to 20,000 Hz (20 kHz). In mixing and mastering, the frequency spectrum is divided into bands (sub-bass, bass, low-mids, mids, high-mids, highs) that each contribute differently to the character and balance of a track.
Full Explanation
The audible frequency spectrum is typically divided into six bands for mixing purposes: sub-bass (20-60 Hz) provides the physical rumble felt in the chest; bass (60-250 Hz) carries the weight and warmth of kick drums and basslines; low-mids (250-500 Hz) contribute body and fullness but can create muddiness; mids (500 Hz-2 kHz) carry the fundamental tones of most instruments; high-mids (2-6 kHz) determine presence and intelligibility; and highs (6-20 kHz) add air, shimmer, and brightness.
A well-balanced mix distributes energy thoughtfully across the spectrum, with each frequency band serving a purpose. Spectrum analyzers display the frequency content of audio in real time, allowing producers to identify problems like excessive low-mid buildup, harsh resonances, or missing high-frequency energy.
Different genres have distinctly different ideal frequency curves. A reference track from your target genre provides a visual and auditory target for spectral balance. Comparing your mix to a reference on a spectrum analyzer reveals specific frequency ranges where you may need to add or remove energy.
In Electronic Music
Electronic music genres have characteristic frequency signatures. Techno emphasizes the sub-bass and low-end (40-100 Hz) with controlled mids. Deep house favors warmth in the 60-200 Hz range with silky highs. Dubstep concentrates massive energy in the 30-80 Hz sub-bass range. Understanding your genre's expected frequency curve is essential for a mix that sounds right in context. Use a spectrum analyzer alongside a genre-appropriate reference track to calibrate your frequency balance.