Miracle FX Frequency Chart
What it doesAn interactive reference chart covering the full 20 Hz–20 kHz audio spectrum: frequency bands, instrument ranges, and note-to-frequency mapping. Click anything to audition it.
AuditionEvery bar and note cell triggers a sine wave at that frequency via Web Audio API. Click a band to hear its centre frequency. Click an instrument bar to hear its centre. Click a note cell to hear that exact pitch.
Freq FinderType any frequency into the finder field to see which band it falls in, what note it's closest to, and where it sits in the spectrum — with a live marker on the chart.
Frequency Bands
Sub Bass (20–60 Hz)Felt more than heard. Kick drum weight, sub bass fundamentals. Too much = rumble on small speakers. Too little = thin on a system.
Bass (60–250 Hz)Warmth, body, kick drum thump. The muddiness zone. Boosting here on several instruments simultaneously creates a cloudy low end.
Low Mids (250–500 Hz)Boxiness, boominess, guitar body. Common source of muddiness in dense mixes. Often a cut zone rather than a boost zone.
Mids (500 Hz–2 kHz)The most important range for human hearing. Vocals, snare crack, instrument presence. Cuts here thin out a mix; boosts can add harshness.
Hi Mids (2–4 kHz)Clarity and definition. Also the ear fatigue zone — extended exposure to boosts here causes listening fatigue. Surgical cuts rather than broad boosts.
Presence (4–8 kHz)Attack transients, consonants, sibilance. Boosting adds punch; too much = harsh and cutting. The cymbals-vs-vocals battleground.
Air (8–20 kHz)Shimmer, sparkle, breath. High-frequency content that adds perceived space and openness. Rolls off naturally with age in human hearing.
Instrument Ranges
Click any barAuditions the centre frequency of that instrument's range as a sine wave. Useful for ear training — identify where each instrument lives in the spectrum.
D&B Production Notes
Sub BassD&B subs typically operate in the 40–80 Hz range. A mono sub below 80–120 Hz is standard practice for club system compatibility — phase coherence on big systems depends on it.
Kick / ReeseThe kick's body sits around 60–120 Hz. In neuro and liquid D&B, the Reese bass often occupies the same space — sidechain and EQ carving are essential to avoid frequency clash.
Amen BreakThe Amen snare crack is primarily 2–5 kHz. The kick thump is 60–100 Hz. Understanding these ranges is key to EQ-ing samples for different sub-genres — more sub removal for neuro, less for liquid.
Note → Frequency Grid
Click any cellPlays a sine wave at the exact frequency of that note. Sustains briefly then fades. Clicking another note interrupts the previous one cleanly.
Tuning referenceAll frequencies are calculated from A4 = 440 Hz using equal temperament. A4 = 440.0 Hz, A3 = 220.0 Hz, A5 = 880.0 Hz.
Useful Reference Points
C1 (32.7 Hz)The lowest practical sub bass note in D&B. Below this becomes inaudible on most systems.
A4 (440 Hz)Concert pitch reference. Standard tuning anchor.
C5 (523.3 Hz)Middle of the vocal clarity range. Synth leads in this octave cut through mixes cleanly.