• šŸŽ§ Audio Frequency Detector

    Detect the frequency of a sound using your microphone. Sing a note, play an instrument, or produce a steady tone to see its approximate frequency, nearest musical note, and pitch accuracy.
    Click Start Frequency Detector and allow microphone access.
    ā€” Hz
    Play a steady sound
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    Flat Centered Sharp
    Nearest Note ā€”
    MIDI Note ā€”
    Wavelength ā€”
    Frequency range information will appear here after a sound is detected.
    How the Audio Frequency Detector works:

    The detector listens to audio from your microphone and analyzes repeating waveform patterns to estimate the fundamental frequency of the sound.

    Frequency is measured in hertz (Hz). One hertz means one cycle per second. For example, the standard tuning note A4 is approximately 440 Hz.

    The tool also converts the detected frequency into the nearest musical note and shows how many cents the frequency is above or below that note.
    Note: Frequency detection works best with a single, steady tone. Chords, background music, percussion, heavy reverb, noise, or multiple instruments playing at once can make the detected fundamental frequency unstable.

  • An Audio Frequency Detector measures the approximate frequency of a sound using your device's microphone. Frequency is measured in hertz (Hz), which represents the number of waveform cycles occurring each second.

    Play an instrument note, sing a steady pitch, whistle, or produce another consistent tone and the detector will estimate its fundamental frequency. It also converts that frequency into the nearest musical note, MIDI note number, and cents difference from equal-tempered tuning.

    For example, the note A4 is approximately 440 Hz. A detected frequency slightly below the target note will produce a negative cents reading, while a frequency above the target will produce a positive reading.

    The tool also estimates the sound's wavelength and identifies the general frequency region, such as sub-bass, bass, midrange, upper mids, or treble. This can be useful for singers, musicians, producers, audio students, instrument builders, and anyone experimenting with sound.

    Frequency detection works best when only one clear tone is present. Chords and complex recordings contain many frequencies at the same time, which can make a single fundamental-frequency reading unstable or misleading.

    Tip: Hold the note steadily for a second or two and keep the microphone reasonably close to the sound source. If the frequency reading jumps between notes, reduce background noise, avoid heavy reverb, and try playing or singing a cleaner sustained tone.

    Related Pages:

    Pitch Matching Tips For Beginners

    Pitch Vs. Tone - Understanding The Difference In Terms