How can I play back an IAB-DCP with easyDCP Player+?

Playback of IAB (Immersive Audio Bitstream) DCPs, including Dolby Atmos content, is supported in easyDCP Player+ starting from version 4.3.

1. Load your DCP

Open your DCP in easyDCP Player+.
If the DCP contains an IAB track, this will be indicated by a “2” icon in the audio playback configuration. This means the package includes:

• An IAB auxiliary track (immersive audio)
• A channel-based mix (e.g. 7.1)

2. Select the IAB Auxiliary Track

In the audio playback section:

• Choose “IAB Auxiliary Track” instead of the channel-based mix
• The player will now use the immersive audio data for playback

3. Choose your rendering format

Select the desired output format depending on your setup, for example:

• Stereo (2.0)
• 5.1 / 7.1
• 7.1.4 (for immersive speaker layouts)

The renderer will automatically map audio objects and channels to your selected configuration.

4. Configure your audio system

Open the Preferences / Options menu:

• Select your target audio configuration
• Verify the channel order used by the renderer
• Ensure it matches your sound card output routing

Correct alignment between software output and hardware routing is essential for accurate playback.

5. Verify playback with a test DCP

For optimal results, use a channel check DCP:

• Confirms correct speaker mapping
• Verifies positioning of immersive audio objects
• Helps ensure your system reproduces height and surround channels accurately

6. Understanding downmix behavior

If you select a lower output format (e.g. stereo):

• The renderer will automatically downmix immersive content
• For example, center channel information is distributed to left and right speakers

Demo DCP available

A dedicated demo DCP with speaker call-outs and moving audio objects is available to help you test your setup.

To request the demo DCP, please contact the easyDCP Service Team via the support form.