# Duet: Audio Under Any App — Your files play under videos

> Your files play under videos (iPhone/iPad app by Santiago Alonso Alexandre.)

- Source: https://appshunter.io/ios/app/duet-audio-under-any-app/id6824279474 (this page in markdown: same URL + `.md`)
- Developer: [Santiago Alonso Alexandre](https://appshunter.io/developer/1880565729)
- Category: Music, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 69 MB
- Released: 2026-11-04
- Data updated: 2026-11-05

## What is Duet?

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.

## Is Duet safe?

Not enough ratings yet to assess Duet.

## Is Duet legit?

Duet: Audio Under Any App appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Duet is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-11-04

No release notes.

## More apps by Santiago Alonso Alexandre

- [Wave: Voice Keyboard](https://appshunter.io/ios/app/wave-voice-keyboard/id6759767993)
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- [Markflow — Markdown Reader](https://appshunter.io/ios/app/markflow-markdown-reader/id6763440990)
- [RawCam – Raw DNG Camera](https://appshunter.io/ios/app/rawcam-raw-dng-camera/id6765531876)
- [Cinemateca: Film Archive](https://appshunter.io/ios/app/cinemateca-film-archive/id6770132112)
- [Pulse: Tap Heart Rate](https://appshunter.io/ios/app/pulse-tap-heart-rate/id6771900515)

All apps by Santiago Alonso Alexandre: https://appshunter.io/developer/1880565729

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-05.*