Duet iOS
Support
Duet plays one sound on a loop and keeps playing when another app starts audio.
Email hi@santiagoalonso.com. I aim to reply within a few working days.
Why does Duet keep playing when a video starts?
That is the point of it. Duet asks iOS to mix its sound with other apps instead of pausing, so you can put rain under a video or brown noise under a podcast and set each volume separately.
How do I change the volume?
Drag the small knob on the ring around the disc. Taps elsewhere on the ring are ignored so you don't change it by accident. The minus and plus buttons step it down and up.
How do I add my own audio?
Tap the record icon at the top right, then Add files, and pick files from the Files app, including iCloud Drive and Google Drive. You can also copy files into Files, On My iPhone, Duet, and they appear the next time you open the app.
Which formats work?
MP3, M4A, AAC, WAV, AIFF, CAF, and FLAC. Cover art and titles embedded in the file are shown on its disc.
Does a file start over every time?
No. Each file remembers where you stopped. Drag the thin line under the title to jump anywhere in it.
A file shows a problem instead of playing
It was probably moved, renamed, or is still downloading from a cloud drive. Open it once in the Files app so it downloads, or remove it in Your files and add it again.
How do I remove a file?
In Your files, swipe left on it. Removing it from Duet never deletes the file itself.
Reporting a problem
Email what you expected and what happened instead, your iPhone model and iOS version, and the file format if it is about one of your files.
Privacy
Read the Duet privacy policy.