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Firo4 is a cutting-edge musical instrument, drum kit, chord builder, and multi-channel looper; all seamlessly designed for maximum playability. Create new music like never before with an instrument that's built to help you turn your song ideas into reality.

• Music first •
Designed from the ground up to help you focus on what you’re creating. Reinvented piano layout extends your expressive potential. Supports 10-finger multitouch and seamless use; keep playing even while adjusting parameters.

• Play your heart out •
Choose from 12 instruments, all optimized for high quality playback. Select from four drum modes with both analog and electronic samples. Add filter and reverb effects to shape your sound.

• Informed by theory •
Choose any key in 7 diatonic modes and 7 secondary scales (Pentatonic, Blues, Whole-tone, etc.) to facilitate stylistic riffs and melodies. Intuitively learn relationships between notes and chords as you play.

• Chords with context •
Quickly build complex harmonies with a single touch; push-button chords adjust to include triads, 6, 7, 9, sus2, sus4 and modulation chords while also informing the chorded zither/autoharp.

• Intuitive looping •
Five auto-expanding, synchronized loopers offer layering, contextual sizing, replay, and simple undo/redo via press-and-hold. Tempo control and beat quantization let you easily align looped sequences on the fly.

• See what you sing •
Visual pitch detection allows you to sing what's in your head and see which corresponding notes light up on the keyboard.

• Record your session •
Record up to 90 minutes of live session audio as you play — then output as both a stereo M4A file (clean output and vocal/mic input) and multi-channel MIDI file.

• Share with the world •
Share your audio recordings with other iOS apps and save files to your computer when you sync your device.

• Connect with other apps •
Send realtime audio directly to other iOS apps via Audiobus and Inter-App Audio. Output MIDI to control other iOS synthesizers or to desktop synths and workstations via WiFi / Bluetooth.

Firo4 is the latest version of Firo (short for Fiddlewax Pro, first released in 2014). Since its humble beginnings, Firo has been downloaded hundreds of thousands of times. We hope you'll give it a try and let us know what you think.