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TunerFree+ExplorerTune by ear or by meter, any instrument Fretboard TrainerFree+ExplorerLearn every note on the guitar or bass neck Vocal Range TestFree+PlayerFind your range and voice type Vocal TrainerFree+ExplorerSing in tune, and know that you are MetronomeFree+ExplorerTempo, accents, odd time signatures Drum RudimentsFree+PlayerSticking, accents, flams and drags
Key & Scale ReferenceExplorerWhich notes fit which key, then drill them Drum MachineFree+Player16 & 32-step patterns, four kits Chord Progression BuilderPlayerBuild progressions, add a bass line, export Melody CreatorPlayerSketch a melody and export it BPM CalculatorFreeTap a tempo, convert BPM to ms, time your sections Delay Time CalculatorFree · sign inDelay times in ms for any tempo dB CalculatorFree · sign inGain, ratio and level conversions Sample Rate ConverterFree · sign inSample rate and bit depth math Reverb Time CalculatorFree · sign inPre-delay and decay from your BPM
Circle of FifthsFree+ExplorerSee how keys relate at a glance Frequency ChartFreeEvery note and EQ range in hertz Key Signature ReferenceExplorerSharps and flats for every key, then drill them
Guitar Chord ChartsFree+PlayerFingerings and voicings on the neck Piano Chord ChartsFree+PlayerEvery chord shown on the keys Chord TransposerFree+PlayerChange key, or find the capo that saves your hand
Interval TrainingFree+PlayerName the distance between two notes Chord RecognitionFree+PlayerHear a chord, name its quality Scale IdentificationFree+PlayerIdentify a scale by sound
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Interactive tools built for musicians. Tune up, lock in your timing, train your ears, and master music theory, right in your browser.

Access Free: no account needed Explorer: $9.99/yr Player: $9.99/mo
Tier
Category
🎯
Free + Explorer
Circle of Fifths
Interactive circle showing all 12 keys, their relative minors, sharps, flats, and common chord progressions. Tap the chords you know and the free Key Finder names the key.
With Explorer Play all seven diatonic chords in any key, the I-V-vi-IV and ii-V-I progressions, and click any chord to audition it
📊
Free
Frequency Chart
Interactive frequency reference for 8 instruments. Visualize EQ ranges, find problem frequencies fast, and put any two parts side by side to see the bands they fight over.
🎸
Free + Explorer
Tuner
Chromatic pitch detection via microphone. Standard guitar tuning free.
With Explorer Bass, ukulele, 7- & 12-string, alternate and custom tunings, reference pitch, precision mode
🎸
Free + Explorer
Fretboard Trainer
Find the prompted note on the right string against the clock, on guitar or bass. Natural notes in open position on guitar free.
With Explorer Full neck to the 12th fret, sharps and flats, a hard mode with no string hint, and a 4-string bass mode
🎤
Free + Player
Vocal Range Test
Sing your lowest and highest notes to find your vocal range, voice type, and singers with a similar voice. Free, with a shareable result card.
With Player Save every result to your account and track your range over time
🎵
Free + Explorer
Vocal Trainer
Sing back played notes and see your error in cents, live. Pitch matching is free; interval singing, guided warm-ups and the steadiness test come with Explorer.
With Explorer Interval singing, guided warm-ups through your range, and the steadiness test
🥁
Free + Explorer
Metronome
Rock-solid tempo keeper with tap tempo, time signatures and accent control. Free.
With Explorer Subdivisions, swing and offbeat accents, polyrhythms, bar pause, speed trainer, saved presets
🥁
Free + Player
Drum Rudiments
Practice the 40 PAS drum rudiments with played-back sticking, accents and tempo control. 12 rudiments free.
With Player All 40 rudiments, automatic speed trainer, a routine builder that chains rudiments into a sequence, saved practice routines
🎼
Explorer
Key Signature Reference
See the sharps or flats for any major key on treble and bass clef, plus all seven diatonic chords with Roman numeral analysis, and a timed drill that asks you to name the key from the staff.
🎵
Explorer
Key & Scale Reference
Every scale and mode in every key, with intervals and diatonic chords, plus a timed drill that asks you to name any degree of any scale.
🥁
Free + Player
Drum Machine
16-step sequencer with 8 synth sounds, swing control, and built-in presets. Program beats right in your browser.
With Player 808, Acoustic and Lo-Fi kits, 32-step patterns, saved beats, MIDI and WAV export
🎶
Player
Chord Progression Builder
Build chord progressions by clicking diatonic chords, put a bass line under them, set your key and tempo, then play them back or export both as MIDI.
🎼
Free + Player
Music Theory
Key signatures, chord progressions, and harmony tools. Browse free; the interactive tools have their own tiers.
With Player Chord progression builder and the interactive key signature reference
🎵
Player
Melody Creator
Create melodies in any key and scale. Tap notes on the piano or generate random patterns in major, minor, pentatonic, blues, and more.
🎸
Free + Player
Guitar Chord Charts
Interactive chord diagrams for guitar. Browse major, minor, 7th, and extended chords with finger positions.
With Player Build progressions from any chord, save them synced to your account, and export MIDI
🎹
Free + Player
Piano Chord Charts
Visual chord diagrams for piano. See root position and inversions for all chord types across all 12 keys.
With Player Build progressions from any chord, save them synced to your account, and export MIDI
🔄
Free + Player
Chord Transposer
Paste a chord chart, move it to any key, and get a capo position that puts it back under open shapes. Lyrics stay exactly where they were.
With Player Saved songs, each with the key and capo you settled on, synced to every device
👂
Free + Player
Interval Training
Identify the distance between two notes. Train your ear to recognize every interval from minor 2nd to octave.
With Player Unlimited daily reps across all three games, streaks and stats synced to every device
🎵
Free + Player
Chord Recognition
Identify chord qualities by ear. Distinguish major, minor, diminished, augmented, and 7th chords.
With Player Unlimited daily reps across all three games, streaks and stats synced to every device
🎼
Free + Player
Scale Identification
Identify scales by ear. Recognize major, minor, pentatonic, and modal scales from audio examples.
With Player Unlimited daily reps across all three games, streaks and stats synced to every device
⏱️
Free
BPM Calculator
Tap to find your tempo, convert BPM to milliseconds for delay and reverb, get sidechain release times and LFO rates for any subdivision, and see how long a bar or section runs in any meter from 2/4 to 7/8.
⏱️
Free
Delay Time Calculator
Sync your delay effects perfectly. Enter your BPM and note value to get the exact delay time in milliseconds.
📊
Free
dB Calculator
Convert between decibels, voltage, and power ratios. Essential for understanding audio levels and gear specs.
📀
Free
Sample Rate Converter
Understand sample rate and bit depth. See how audio quality changes at 44.1kHz vs 96kHz vs 192kHz.
🌊
Free
Reverb Time Calculator
Enter your tempo and get tempo-synced reverb pre-delay in milliseconds, plus decay times that end before the next beat or bar instead of smearing into it.

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