Music Theory Decoder vs Pro

Stop juggling five different apps and theory books. Music Theory Decoder combines a complete music theory guide — 18 in-depth lessons with interactive examples — with the practical tools you actually need: chord finder, scale library, tuner, metronome, drone, and vocal practice. Built around an interactive Circle of Fifths, every theory concept links directly to the chords, scales, and progressions where you'll use it. Hear it. See it. Understand it. — WHAT'S INSIDE — ◆ DECODER The interactive Circle of Fifths at the heart of the app. Tap any key to see its diatonic chords (I, IV, V, ii, iii, vi, vii°) laid out clearly. Flip the card to access 12 classic chord progressions — Pop Classic, Four Chords, 50s Doo-Wop, Jazz ii–V–I, 12-Bar Blues, Pachelbel, Andalusian Cadence and more — auto-transposed to your chosen key. Hit play, pick a tempo (60–120 BPM), and hear them with the playing chord highlighted in real time. ◆ SCALES 20 scales across five categories: Modes (Ionian through Locrian), Minor (natural, harmonic, melodic, pentatonic), World (blues, flamenco), Japan (Hirajoshi, Insen, Yo), and Middle East (Phrygian Dominant, Double Harmonic, Hijaz). Every scale shows notes on guitar fretboard and piano keyboard, with audio preview up and down. ◆ CHORDS 30 chord types across all 12 roots — triads, 7ths, 6ths, altered dominants, extended 9/11/13 voicings. Multiple guitar fingerings per chord. Every interval labeled so you understand what you're playing. ◆ INTERACTIVE THEORY GUIDE 18 in-depth lessons covering everything from intervals to extended chords: Intervals, Scales, Three Minor Scales, Circle of Fifths, Chord Construction, Diatonic Chords, Chord Functions, Progressions, Cadences, Voice Leading, Secondary Dominants, Borrowed Chords, Modal Chords, Extended & Altered Chords, Guitar Theory, Piano Theory and more. Each lesson includes interactive staff notation, real examples, and direct links to the Circle of Fifths, scales, and chords where the theory actually lives. Theory you don't just read — you hear and play. ◆ TOOLS (7 professional utilities) • Tuner — Chromatic, accurate, with smooth spring animations • Metronome — Compound time (6/8, 9/8, 12/8), swing slider, beat accents, tap tempo, four click sounds • Drone — Continuous reference pitch for practice and improvisation. Four waveforms, three octaves • Free Sing — Real-time pitch monitor for singers. See every note you sing with cent-accurate tuning feedback • Vocal Warm-Up — Breathing coach + scale exercises with real-time pitch tracking • Capo Calculator — Instantly find capo position for any key • Transpose — Move any chord progression to any key — WHY MUSIC THEORY DECODER — ◆ All-in-one. Replace your tuner app, metronome app, theory book, chord library, and vocal tools with one unified experience. ◆ Built for real musicians. Dark theme, bold typography, professional design. Not a cartoon learning app — a working tool. ◆ Vocalists included. Free Sing, Vocal Warm-Up, and Drone form a complete practice suite for singers — a category most theory apps ignore. ◆ Learn by doing. Every theory section links to the interactive Circle of Fifths, scales, and chords. Hear it, see it, understand it. — WHO IT'S FOR — Guitarists learning chord theory. Pianists working through modes. Vocalists practicing intonation. Songwriters hunting for the right progression. Students preparing for exams. Band musicians decoding lead sheets on the fly. Whether you're picking up your first instrument or arranging your next album, Music Theory Decoder gives you the answers fast — and teaches you why they work. Requires iOS 16.0 or later. Microphone access used only for Tuner, Free Sing, and Vocal Warm-Up — audio is processed on-device and never recorded or transmitted.

PRO-A5 (10-Voice Analog Synth) Experience the warm organic sound of the most iconic analog poly synth ever made. From Lush Brass, Silky Pads and Basses to Soaring Leads, this is the sound that defined Music Icons from the 80s to Radiohead. MAKE THE MUSIC YOU LOVE "SOUNDS AMAZING!" – Jim Sheridan, Live Band on "Name that Tune" TV Show on Fox Indie, Hip Hop, Pop, Funk, 80s, Synthwave, Rock, Lo-Fi, EDM, Ambient.. your sound awaits! "Sounds Authentic and Beautiful" – Synth Anatomy PURE SYNTH POWER! 2 FILTERS: Classic "REV 3" Inspired Stepped Filter Grit with Beautiful Stepping & Modern Smooth options Powerful Oscillator Sync, Poly Mod, Per-voice Analog Panning, Poly Unison stacks... "Pro-A5 synth is bonkers!!! Great job!!" – Kennard Garrett, Grammy-winning producer Plus a magic “Tune Rez” button that instantly tunes the filter self-oscillation so you can play the filter “I’m speechless. My most favorite analog synth on iPad ever. Unbelievable 70s / 80s feel” – Jay Zen, Producer "Fantastic! I've got at least 100 synths, yet Pro-A5 has impressed me. Great emulation and sounds unique. Genius!" – DMT Cymatics "This thing sounds totally insane. Makes me want to put wooden sides on my iPad" – Bri Kup "It has that warmth that other digital synths don't have" – Fieldtone Audio WATCH VIDEOS TO HEAR IT IN ACTION: audiokitpro.com/proa5 FEATURES • Desktop-VST Quality 10-Voice poly synth • NEW Sound Engine with advanced analog-modeling DSP • Authentic Poly-Mod with Filter ENV & OSC B as sources • Professionally modeled filter with self-oscillation • MICROTONALITY Panel + 150 Curated Scales (Microtonal, Indian, 12-tone, and more) • 600+ Exclusive Presets included (more to come) • 2 Filter styles: Classic Stepped "REV 3" Inspired and Modern Smooth • Magic “Tune Rez” button to instantly tune self-oscillation • 10 voices x 5 unison voices = almost a P-50?! You know the sound. If you need more details: • Raw, gritty Oscillator Sync • Accurate PWM engine with unique hardware-style Poly Mod behavior • Per-Voice Analog Panning • Single Note Polyphony for mono and poly sounds • 2x oversampling for more analog-style lows and highs • Original Hardware controls fit on one screen on iPad! • Aftertouch with 60+ possible destinations • 3 LFOs with 60+ destinations • LFO Shapes use analog resistor-mix behavior with soft-limiting • Dual assignable Touch Pads for real-time performance control • Classic Arpeggiator • Vintage-style Step Sequencer • NEW Cascading Reverb • FX: Rage Limiter, Analog Tape Delay, Chorus, Crush, and more • MIDI keyboard support + MIDI Learn • Universal app for iPhone and iPad • 432 Hz and selectable A-Tuning • Choose a key like Cm, Bb, Fm, and more. Select from Major, Minor, Blues, Pentatonic, and other scales you know and love! • Bonus Filter panel with slopes, envelope inversions, and extra goodies • No ads, subscriptions, or in-app purchases WORKS AS A PLUG-IN Use PRO-A5 as an AUv3 instrument in Logic for iPad, GarageBand, AUM, Cubasis, and more. WORKS BY ITSELF No other apps required. Play it standalone, connect a MIDI keyboard, map your controls with MIDI Learn, and start making music right away. EXPRESSIVE CONTROL PRO-A5 is built for performance. Use velocity, aftertouch, touch pads, LFOs, Poly Mod, MIDI Learn, and real-time FX control to make sounds move, breathe, and evolve. FREE UPGRADES MPE and Polyphonic Aftertouch are planned as a FREE future upgrade. PRO-A5 brings classic poly synth magic into the future. LEGAL NOTICES PRO-A5 is an original AudioKit instrument created to celebrate music-making and classic analog synthesis. It is not an official emulation, clone, or recreation of any specific hardware instrument. “REV 3” is used descriptively to refer to a revision-style sound character and does not imply affiliation with or endorsement by Sequential or any other third-party manufacturer. All trademarks are the property of their respective owners.