Duet: Audio Under Any App

Duet plays your own audio underneath whatever else your iPhone is playing. Normally, when a video or podcast starts, iOS stops the recording or track you had on. Duet keeps going. Start a voice memo, a practice track or an audiobook in Duet, then open a video, a podcast or a game: both play at once, and Duet keeps its own volume, so it sits exactly where you want under the other sound. YOUR FILES, UNDER EVERYTHING - Add audio from the Files app, including iCloud Drive and Google Drive, with the system file picker. - Each file becomes its own disc with its cover art, loops until you change it, and picks up where you left off. - Plays MP3, M4A, M4B, AAC, WAV, AIFF, CAF and FLAC, and reads FLAC titles and cover art. - Files you drop into Duet's folder in the Files app show up on their own. ONE SCREEN - Swipe anywhere to change discs. - Tap the disc to play or pause. - Drag the knob around the ring to set Duet's volume, separate from the system volume. - A thin scrub line shows where you are in a file. A FEW SOUNDS TO START WITH Duet also comes with ten short recorded loops (rain, birds, wind and surf), so there is something to play under a video before you add your own files. No account, no ads, no tracking, no network access. Your files stay where they are.