OCTAVE: Tuner & Ear Training

Ten offline practice tools: chromatic strobe tuner, pitch hold, metronome, tap tempo, vocal range, scales, chord progressions, ear training, drone, and scope.

OCTAVE is a pocket music toolkit: ten focused tools, one tap from the home screen. Each opens full screen, ready the moment it appears.

TUNE: chromatic tuner • Strobe ring that spins with your error and closes into one solid ring when you are in tune • Chromatic, Guitar, Ukulele and Violin modes; tap a string to pin it • Guitar tunings: Standard, Drop D, DADGAD, Open G • Reference tone that holds until you stop it, from E1 to C7 • Reference A4 from 415 to 446 Hz; Bb, Eb and F transposing display

HOLD: hold a steady note • Live pitch trace around a ±10 cent band • A score from 0 to 100 with offset, wobble, drift and vibrato • History of your recent holds and the notes you held them on

SCALE: scales and modes • 14 scales and modes on a pitch circle and a two-octave keyboard • Drag the circle to change key; tap a key to hear it; play the scale up and down

CHORD: chords and progressions • 15 chord qualities and 9 progressions in any key • Smooth voice leading shown on the keyboard as it plays

BEAT: metronome • 20 to 300 BPM with a swinging pendulum and tempo names • 4/4, 3/4, 6/8, 5/4, 7/8 or your own meter; accent, normal or mute each beat • Subdivisions, count-in, three click sounds, haptic pulse • Tap the pendulum to set the tempo; keeps playing in the background

TAP: tap tempo • Tap anywhere, or clap into the microphone • Tempo to one decimal, with stability and a timing strip that shows early and late taps • Send the tempo straight to BEAT

RANGE: find your vocal range • Sing low and high; OCTAVE marks your lowest and highest notes, span and voice type • Your range is kept until you reset it, with a history of sessions

SCOPE: see sound • Six views: Bloom, Spectrum, Wave, Sparks, Chroma and Level • Detected note and key; freeze a frame and drag to inspect it

EAR: ear training • Intervals, chords and scale degrees, answered with one tap • New answers unlock as you improve; hear every option after you answer

DRONE: drones and pedal tones • Tanpura, organ, strings or sine in any key, with a mixer for each string • Fine tuning in cents; keeps playing in the background

Made for iPhone • In English, Simplified and Traditional Chinese, Japanese, Korean, German, French, Spanish and Brazilian Portuguese • Every sound is synthesised on the device

Private by design OCTAVE works offline. Audio from the microphone is analysed on your iPhone and is never recorded or sent anywhere. No account, no analytics, no ads.