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