Audio file input

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Media file input/ Audio file input

Audio file inputs support playback of audio-only files and looped playback.

It is possible to import multiple audio files by using the Application menu “File/Import media…”

The supported Audio codecs are currently WAW and MP3, with a sample rate of 48KHz.


  • Media source - Use the Load button to load an audio file into Composer. If a file has been loaded but the file has been modified, you can use the Reload button to refresh the file in Composer. Use the Clear button to unload the file.

  • Playback state - Current playback state

  • Commands

    • Play button - Start playback

    • Pause button - Pause playback

    • Stop button - Stop playback

  • Configuration

    • Loop playback —This determines if the playback should loop at the end of the file.

    • Start playing when loaded - Check this option to automatically start playback when the file is loaded (Default).

  • Performance and properties

    • Message - Info Message

    • Audio buffer length (ms) - Audio buffer length (in ms)

    • Current time - current playback time (Time code) in hours:minutes:seconds:frames.

    • Number of loops played - Counting the number of loops

    • Dispose LibAv - Composer will dispose the LibAv library when playback is stopped or looped.

    • AudioTrackInfo - detailed debug information on audio track properties

  • Render Options - These options, together with Render Tuning (see Performance and Options), help optimize performance by letting Composer automatically decide whether the input should be rendered.

    When your project’s Render Tuning option is active, Composer manages each input’s rendering automatically for best performance.
    These options allow you to override that behavior and manually decide if this input should be rendered or excluded from the scene.

    Render Tuning vs Render Options

    Render Tuning works at the project level (see Performance and Options), automatically managing which inputs are rendered across all Scenes for optimal performance.

    Render Options work at the input level, letting you manually override or fine-tune how a specific input behaves within Composer’s automatic rendering process.

    • Invisible (do not render in scene) - The input will not produce any visible output in the scene, regardless of whether Render Tuning is enabled at the project level.

    • Do not render input

      • Let Composer decide (default) - Composer automatically decides whether the input should be rendered, based on the active Scene and Render Tuning is enabled.

      • Manual configuration - Allows you to manually control rendering behavior using the Render switch (see below).

    • Render -  A toggle switch is available only when Manual configuration is selected.

    ender Options - The Render Options, in conjunction with Render Tuning (see the Project Options tab), are designed to optimize performance automatically; some situations may require more manual control. Each input provides advanced options to override the automatic behavior:

    • Invisible (do not render in scene) - The input will not produce any visible output in the scene.

    • Do not render input

      • Let Composer decide (default) – Composer automatically decides whether the input should be rendered, based on the active Scene and if Render Tuning.

      • Manual configuration – Allows you to manually control rendering behavior using the Render switch (see below).

    • Render - A toggle switch available only when Manual configuration is selected.

  • Audio - Configure metering, gain, pan, auxiliary sends, mute/solo, routing, and audio channel remapping for this input. See Audio options for more information.

  • Optional TAGS

    • TAGS - Add a "tag"  that can be used in the input smart search function. It is possible to add several tags by separating them by a SPACE char.

Note! For seamless playback of loops, make sure your audio file don’t contain silent audio at the end of the file.