1. Home
  2. Reference

Hub

Reference you can
press play on.

Look up a kick frequency, a piano note, a delay time or a key signature, and hear it on the same page. Pages that would only swap a number were not published.

  • Instrument EQ
  • 88 piano notes
  • Curated frequencies
  • Tempo tables

Index

Every published reference page

Instrument EQ

Intervals

Frequencies

BPM delay tables

Keys

Scales

Chords

Piano notes, A0 to C8

StudioEars app icon
StudioEarsEar training for iPhone & iPad

Look it up once. Recognize it next time.

StudioEars is the practice layer on top of these charts: short sessions that come back to what you miss.

Download on theApp Store

Free to start. 5 free training units every day plus built-in studio tools.

  • EQ & compressionDaily drills on drums, bass, guitars and full mixes.
  • Intervals & chordsPiano training that uses the same note names as these pages.
  • Studio toolsMetronome, tone generator and tap tempo live in the app too.

FAQ

Reference questions

Why isn't there a page for every hertz?

A page that only changes the number in the title does not help you, and it is the pattern search engines treat as scaled content abuse. The frequency list is the bands engineers actually solo.

Why isn't every BPM from 60 to 200 here?

The tempos below are the ones people set a delay or a click to. The calculator covers everything in between. More BPM pages wait until these are indexed and earning impressions.

Where do the numbers come from?

Equal temperament at A4 = 440 Hz, delay math of 60,000 ÷ BPM, and EQ bands chosen as starting points rather than rules. Details are on the methodology page.