Root Note
Chord Quality
Octave
Playback
C - E - G
How chords are built
Every chord here is defined by intervals - distances in semitones from the root. A major triad is 0-4-7, a minor triad 0-3-7. Seventh chords add a fourth note. Change the root and the same interval pattern gives you the chord in a new key.
Train your ear
Play major and minor back to back on the same root until the difference is obvious, then add sevenths. Pair this with our pitch pipe for single reference notes or the instrument tuner to tune up before you play along.
Chord Player FAQ
What is a chord?
A chord is three or more notes sounding together. The most common chords are triads - a root note plus the notes a third and a fifth above it. The exact spacing (intervals) between the notes determines the chord quality: major, minor, diminished, augmented, and so on.
What is the difference between major and minor chords?
One semitone. A major chord stacks a major third (4 semitones) then a minor third (3 semitones) above the root; a minor chord reverses that order. The lowered middle note of a minor chord is what makes it sound darker or sadder than the bright, resolved sound of a major chord.
What are seventh chords?
Seventh chords add a fourth note - a seventh above the root - to a triad. A dominant 7th (C7) has a bluesy tension that pulls toward resolution, a major 7th (Cmaj7) sounds lush and jazzy, and a minor 7th (Cm7) sounds smooth and mellow. They are the backbone of jazz, soul, and R&B harmony.
How can I use this chord player for ear training?
Pick a root note, play different chord qualities back to back, and learn to name the quality by sound alone. Then have a friend (or random clicking) choose chords while you identify them without looking. Arpeggio mode helps you hear each note separately before blending them.
Why do the chords use piano-like tones?
The chord player synthesizes each note with layered oscillators and a soft attack-decay envelope, which keeps the individual notes clear without harsh beating between harmonics. For pure single-frequency tones, use our tone generator instead.
Try Our Other Audio Tools
Online Tone Generator
Generate single tones with precise frequency control. Perfect for quick audio testing and tuning.
Multiple Tone Generator
Play multiple frequencies simultaneously with independent volume and panning controls.
Frequency Sweep Generator
Create linear or exponential frequency sweeps for speaker testing and room acoustics analysis.
Binaural Beats Generator
Generate binaural beats for meditation, focus, and relaxation. Requires headphones for proper effect.
DTMF Tone Generator
Generate telephone dial pad tones (Dual Tone Multi Frequency). Interactive touch-tone dial pad.
Online Metronome
Professional metronome with tap tempo, time signatures, subdivisions, and tempo trainer for musicians.
BPM Counter
Tap along to any song to find its tempo in beats per minute. Includes tempo markings reference.
Chord Progression Player
Hear classic progressions like I-V-vi-IV and 12-bar blues in any key at any tempo.
Online Piano
Free browser piano with 3 octaves, note names, and computer keyboard support.
Noise Generator
Generate white, pink, and brown noise for sleep, focus, tinnitus relief, and speaker burn-in.
Instrument Tuner
Reference tuning notes for guitar, bass, ukulele, violin, cello, and more at concert pitch (A440).
Subwoofer Test
Test your subwoofer with a 60-second frequency sweep (150Hz-1Hz) and individual bass test tones.
Hearing Test
Test your hearing range from 8kHz to 20kHz. Find your hearing age and compare with averages.
Solfeggio Frequencies
Ancient healing tones including 528Hz (DNA repair). For meditation, chakra activation, and spiritual healing.
Speaker Balance Test
Test stereo balance with panning control and left/right channel testing. Perfect for speaker setup.
Speaker Phase Test
Check speaker wiring polarity by comparing in-phase and out-of-phase test signals.
Audio Latency Test
Measure your Bluetooth or system audio delay in milliseconds with a click-and-flash sync test.
Spectrum Analyzer
Real-time frequency analysis of your microphone input with a live log-frequency display.
Decibel Meter
Measure approximate sound levels with your microphone - live dB with min/avg/max tracking.
Mic Test
Check your microphone in seconds: live waveform, level meter, and record-and-playback check.
Interval Ear Trainer
Learn to recognize musical intervals by ear with quiz mode, score tracking, and song mnemonics.
Pitch Pipe
Chromatic pitch pipe with all 12 notes across 3 octaves. Perfect for singers, choirs, and a cappella groups.
Shepard Tone
Experience the auditory illusion of an infinitely ascending or descending tone. Mind-bending psychoacoustic phenomenon.
Mosquito Tone
Can you hear the mosquito tone? High-frequency test (15-20kHz) that only young people can hear. Find your hearing age!
Soundscape Builder
Create relaxing ambient soundscapes with singing bowls, nature sounds, and binaural beats.
Water Eject Sound
Push water out of a wet phone or watch speaker with a pulsed 165 Hz tone - the same method Apple Watch uses.
Dog Whistle
Adjustable high-frequency whistle (8-22 kHz) for dog training - clearly audible to dogs, silent to most adults.
Isochronic Tones
Rhythmic pulsed tones across delta to gamma ranges. Stronger than binaural beats and works without headphones.
Perfect Pitch Test
Name 12 random notes with no reference tone and find out if you have absolute pitch or great pitch memory.
Vocal Range Test
Sing your lowest and highest notes and get your range plus voice type - bass to soprano. Mic-based, nothing uploaded.
Hearing Age Test
Find the highest frequency you can hear (8-20 kHz) and see how old your ears test. Takes one minute.
Vocal Remover
Instant karaoke via center-channel cancellation - free, unlimited, and processed locally.
Voice Recorder
Record from your microphone and download as WAV - no signup, nothing uploaded.
Volume Normalizer
Normalize any file to a LUFS target with true-peak protection instead of silent clipping.
Drum Machine
16-step beat maker with synthesized 808-style drums, swing, and shareable pattern links.
Audio Analyzer / LUFS Meter
Drop a file and get integrated LUFS, true peak, RMS, and a waveform - measured locally, nothing uploaded.
Chromatic Tuner
Microphone tuner with a cents needle - play any note on any instrument and tune to ±5 cents.
Headphone Test
Five-minute headphone checkup: channels, wiring polarity, bass and treble reach, and driver distortion.
Surround Sound Test
Send noise to each 5.1 channel - fronts, center, surrounds, and subwoofer - and catch swapped or dead speakers.