What is a .THD file?
THD holds Dolby TrueHD lossless surround audio, used on Blu-ray.
- Did you know
- A TrueHD stream on Blu-ray can peak at 18 Mbit/s, dozens of times the bitrate of a typical lossy Dolby Digital track.
- Dolby TrueHD compresses audio using Meridian Lossless Packing, the same scheme once used for DVD-Audio.
- On Blu-ray it serves as the carrier for Dolby Atmos, embedding the metadata that places sounds in 3D space.
- What Analyser reads
- Identify Dolby surround codecs - Digital Plus (E-AC-3), TrueHD, MLP, and Atmos - with channel-layout detection (5.1, 7.1).
- Depth of analysis
- .THD is an identification-grade format: Analyser recognises it from its bytes and decodes the header metadata it carries, rather than opening it in a full viewer. Formats that do get a full viewer are marked "Full" on the formats page.
- Open a .THD file
- Drag a .THD file onto the Analyser home page (or tap to pick one). It is identified entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.