NoteStream

"NoteStream" is a premium MIDI keyboard and visualizer app that lets you import and play your favorite MIDI files with a stunning, visual piano roll. Simply press the keys as notes cascade from the top of the screen. Whether you are a beginner or a seasoned pianist, you can enjoy intuitive learning and performance. 【Key Features】 ■ Stunning Piano Roll Visualizer (Synthesia-style) Easily import and play your own MIDI files (.mid / .midi) from your local storage. Practice efficiently with features like grid/bar line guides, tempo-synced animations, playback speed control (10% to 400%), and 3-second seek (fast forward/rewind). ■ Responsive 88-Key Full-Scale Piano Real-time rendering of an 88-key keyboard with low-latency and multi-touch support. Active keys light up dynamically in blue when touched or played by the MIDI file. Customizable octave helper labels on white keys. ■ Rich Sounds & Customization Built-in high-quality piano sounds with support for downloading and using external Soundfonts (.sf2). Instantly switch between 128 General MIDI standard instruments to find your perfect sound. Customize your acoustics with adjustable reverb (echo) depth. ■ Immersive Play & Global Support Play without distractions using landscape orientation lock and sticky immersive full-screen mode. Fully localized in 11 languages (English, Japanese, German, French, Spanish, Italian, Portuguese, Korean, Chinese, Hindi, and Russian).