MultiTuneKeys vs Rubberband

MultiTuneKeys — Multi-Temperament Piano Keyboard A piano keyboard app you can play with a touch. Enjoy it casually, or switch between 7 different tuning systems to hear the differences. Note: This app does not include piano sound. To make tuning differences clearly audible, it uses 4 simple waveforms (sine, triangle, square, sawtooth — sine and triangle include harmonics control). Whether you want to play casually in equal temperament, or explore historical tunings like Just Intonation or Pythagorean — from a curious starting point to deep musical study, all in one app. ■ 7 Temperaments • Equal Temperament (12-TET) • Just Intonation • Pythagorean • 1/4-comma Meantone • Werckmeister III • Kirnberger III • Custom Tuning — fine-tune each note in 1-cent steps within a ±100 cent range ■ Custom Tuning Editor • 12 vertical sliders aligned with the keyboard • Set a base note and tune intervals by ear • Save up to 3 user presets • Templates: load Just, Pythagorean, Meantone, Werckmeister, or Kirnberger as a starting point • Real-time audio feedback while adjusting (held notes follow slider changes) ■ HOLD (Sustain) — perfect for pitch reference • Sustained notes keep ringing after you lift your finger • Tap a held key again to release just that note • Great for practicing intonation against a chosen tuning while playing your own instrument ■ Anchor Mode • A=440 (default): keep A fixed at the reference pitch — historically authentic, ensemble-friendly • Tonic: keep the tonic at its equal-tempered pitch and let A drift — useful for comparing the same tonic across different tunings ■ Performance Features • Pitch bend wheel with adjustable range (±1 to ±12 semitones) • 4 waveforms: Sine, Triangle, Square, Sawtooth • Harmonics control for Sine and Triangle • Adjustable master volume • Reference pitch: A=415 / 432 / 440 / 441 / 442 / 443 Hz or custom • Haptic feedback on key press • Loudness curve adjustment per waveform ■ For Musicians & Educators • Hear the difference between tuning systems instantly • Perfect for teaching music theory and acoustics • Compare pure intervals in Just Intonation with Equal Temperament • Explore historical temperaments used in Baroque and Renaissance music Banner ads are shown by default. Remove them with a one-time in-app purchase.

RUBBERBAND is not a keyboard. It's an elastic surface where every line is a magnet: you glide, and GRAVITY pulls notes toward the scale. All the way up, you can't play out of tune. At zero, it's free glissando. In between, your ear decides. A microtonal synth built to be both an instant toy and a serious instrument — played like a theremin or a ribbon controller, tuned like the world. THE WORLD'S TUNINGS RUBBERBAND truly speaks microtonality — not an effect, the heart of the instrument. Arabic maqam, Turkish makam, Persian dastgah, just intonation, just blues and barbershop, klezmer modes, Southeast-Asian equiheptatonic, xenharmonic temperaments (19- and 31-TET, the harmonic series), Western scales — with region-adjustable neutral tuning. The engine thinks in cents: any tuning on Earth is within reach. 36 VOICES Plucked strings, basses, bowed instruments (violin, cello, kamancheh, sarangi), bells and bars, synth voices, the RUBBER↔STRING morph, the instruments of the East (oud, qanun, santur, ney, zurna, duduk), and granular clouds. Every voice is physically modelled and rendered in real time — no samples. EXPRESSIVE UNDER THE FINGER (MPE) Pressure is dynamics; gliding along a string changes the colour, from sul tasto to ponticello; vertical is pitch. Tilt the phone and it becomes an axis of expression. MPE MIDI out drives your other synths with the same gestures. LISTEN TO THE ROOM RUBBERBAND hears the music around you, detects the key, and tunes to it. Play along with anyone, in tune. ALSO A DRONE holding the tonic under your playing, a sympathetic halo that rings the neighbouring strings, a LOOPER to stack loops, and recording your takes straight to your device. IN YOUR LANGUAGE Full interface in English, French, Spanish, Italian, Portuguese (Brazil), German, Turkish, Japanese, Simplified Chinese, Korean and Arabic — with real musician vocabulary in each, not machine translation. Haptics, Metal rendering, fully native. No account, no ads, no data collected — the microphone is analysed locally and never recorded or sent. FREE, THEN PRO Start free: the full elastic surface, starter voices, and a taste of the world's tunings. The RUBBERBAND PRO unlock (one-time purchase) opens all 36 voices, the full catalogue of world tunings, recording and sharing, MPE MIDI output, MOTION and LISTEN. One-time purchase. No subscription.