4TRX is your personal recording studio on your phone! Perfect for musicians to record their ideas whenever and wherever inspiration strikes! Create a new project, record or import up to four audio tracks, mix them together, and save it to an audio file for sharing with OneDrive (formerly SkyDrive) or DropBox!
v1.9.7.2 Update
* Bug Fixes

v1.9.7.1 Update
* Changed Ad Rotations

v1.9.7.0 Update
* Bug Fixes For Large Screen Devices

v1.9.6.9 Update
* Minor bug fixes.
* New sample song.

v1.8.6.9 Update
* Added ability to send links to songs you've uploaded to OneDrive directly from the App.
* UI tweaks.

v1.7.6.9 Update
* Minor UI tweaks.

v1.6.6.9 Update
* Changed simple theme design.

v1.5.6.9 Update
* Fixed volume writing bug during mixing.
* Added ability to import from OneDrive or Mixdown list.
* Updated 'settings' and 'about' pages.
* UX improvements.
* Minor bug fixes.

v1.4.6.9 Update
* Mixing screen now updates user on progress.
* Renamed SkyDrive to OneDrive to match new branding.
* Deleting a project now deletes audio files associated with it.

v1.3.6.9 Update
* Rewrote audio mixer to address crashes on certain devices.

v1.2.6.9 Update
* Reliability improvements.
* Added pause button to mixdown page.
* UI enhancements.

v1.1.6.9 Update
* Fixed file delete bug where deleting a file would remove it from the list, but its audio would sometimes still play. If you've experienced this bug you may need to uninstall and reinstall the app.
* Added "Pause" button to studio page.
* Slider visibility is now bound to audio tracks.
* UI touch improvements.
* Improved audio latency on playback and record.
* Rejiggered the mixing process for creating mixdowns.

v1.0.6.9 Update
* Bug Fixes


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Required Capabilities

    More info / Source

    Web Marketplace

    4TRX icon

    v1.9.7.2 Paid£0.79$0.99€0.99



    App Category

    Tools + Productivity



    Rated by 165 people


    32.83 MB Installed
    24.01 MB Download

    First Published

    Last Updated


    • English (All)
    • English (United States)


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