MIDI Shimmer

MIDI Shimmer turns your iPhone or iPad into a professional synthesizer with a true shimmer reverb engine.

Connect any MIDI keyboard wirelessly via Bluetooth LE or wired via USB-C, and instantly access 28 hand-crafted presets across five categories: Pads, Keys, Strings, Brass & Wind, and Synth.

SHIMMER REVERB Shimmer reverb is the ambient effect behind countless iconic pads and soundscapes: every note is pitch-shifted up one octave and fed into a long cathedral reverb, creating a glowing halo of sound that trails above the note you play. MIDI Shimmer runs two independent FX buses in parallel — a natural hall reverb and the shimmer path — both continuously adjustable with dedicated sliders.

FEATURES • 28 presets across Pads, Keys, Strings, Brass and Synth — including a Korg D1 E-Piano • True shimmer reverb — parallel octave-shifted cathedral reverb bus • Dual FX Mix panel — Reverb, Shimmer, and Master Volume sliders per preset • Bluetooth LE MIDI — connect wirelessly to adapters like the Yamaha MD-BT01 • USB MIDI — plug in any keyboard via USB-C hub • Real-time chord detection — names every chord you play (maj7, m9, sus4, inversions) • Chord history breadcrumb — scrollable log of your progression • Built-in demo — tap ▶ to hear the synth without a keyboard • Sustain pedal support (MIDI CC 64) • Background audio — sound continues when screen locks • Adaptive portrait and landscape layout for iPhone and iPad • Ultra-low latency via AVAudioEngine • No account, no subscription, no internet required