DuoBox: Fold Accordion
Press kit, October 2026

WHAT IT IS
DuoBox turns iPhone Duo into an accordion. You hold the open phone like a
book, with the bass buttons under one hand and the treble keys under the
other, and fold it to work the bellows. Opening is pull and closing is push.
The faster you fold, the louder and brighter it plays.

An accordion is the one instrument that only sounds while it folds, and
folding is what iPhone Duo does that no other iPhone can.

FACTS
Launch:       October 23, 2026, the day iPhone Duo goes on sale
Price:        Free to play. One $4.99 purchase unlocks everything.
              No subscription, no ads, no accounts, no data collected.
Platform:     iPhone, iOS 27 or later. Made for iPhone Duo. On other
              iPhones you drag the bellows with a finger.
Languages:    English, Spanish, Portuguese, German
Developer:    Aaron Peabody, an independent developer

WHAT'S IN IT
- Three accordions: a piano accordion, a three-row Norteño button
  accordion in five tunings, and a one-row diatonic box
- Eleven treble registers, including Musette and Bandoneon
- Reeds synthesized live on the phone, in stereo, with the bass on the
  left and the treble on the right
- Plays closed on the cover screen as well as open
- Song mode that lights the next key and chord
- Recording to stereo 48 kHz, 24-bit WAV stems, with a count-in that puts
  each take on bar 1 in Logic Pro, and MIDI out over Bluetooth or Wi-Fi
  with the bellows sent as expression
- A left-handed layout, Do Re Mi note names, and VoiceOver support

LINKS
Website:      https://aaronpeabody.dev/duobox/
Try it now:   https://testflight.apple.com/join/Twfkyj2k  (public beta)
App Store:    https://apps.apple.com/app/id6818382295  (live on October 23)
Contact:      aaron@aaronpeabody.dev

IN THIS FOLDER
icon/                    the app icon, 1024 x 1024
screenshots-iphone/      six captioned screenshots, 2778 x 1284
screenshots-iphone-duo/  six plain screenshots at iPhone Duo's own size:
                         five of the inner display, one of the cover display
art/                     a wide banner and the instrument on the open Duo
video/                   a 27-second preview with sound

The screenshots and video were captured in Apple's iPhone Duo simulator.
You are welcome to use anything here in coverage of DuoBox.
