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Frequency

250 Hz test tone

The classic mud frequency. Vocals, guitars and pianos all pile up here. Cut before you reach for more treble.

  • Sine and square
  • Nearest note B3
  • +21 cents

250 Hz

Play it, then see what note it is closest to

Nearest noteB3+21 cents
Period4.000 ms
Wavelength1.37 m343 m/s
MIDI of nearest59

The classic mud frequency. Vocals, guitars and pianos all pile up here. Cut before you reach for more treble.

The nearest equal-tempered pitch is B3 at 246.94 Hz, 21 cents below this tone. The full generator, with sweeps and noise, is the tone generator. This page is the canonical reference for 250 Hz.

Nearby published frequencies

StudioEars app icon
StudioEarsEar training for iPhone & iPad

Find this band inside real music.

Frequency training in the app hides a boost in a loop and asks you to name it, which is harder than a naked sine wave.

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

250 Hz questions

What note is 250 Hz?

B3, 21 cents sharp, when A4 is 440 Hz.

Why publish 250 Hz and not 251 Hz?

Because this one sits on a band engineers solo, a tuning reference, or a hearing check. The tone generator already plays every frequency in between.

How loud should I listen?

Keep a 250 Hz tone at a conversation level. These pages can generate steady tones and noise, which fatigue your ears faster than music. If anything rings or feels uncomfortable, stop and turn the volume down.