Dolby Digital vs DTS: Audio Format Differences Explained

Dolby Digital and DTS are the two dominant surround sound formats for movies, Blu-rays, and home theater systems. Dolby Digital encodes 5.1 surround sound at up to 640 kbps, while DTS uses less compression at up to 1.5 Mbps. In practice, both sound excellent and most receivers support both formats. Dolby Digital has wider streaming support; DTS encodes at higher bitrates.

Bitrate and Compression

The core difference is how aggressively each format compresses audio. Dolby Digital (AC-3) compresses 5.1 channel audio down to 384-640 kbps on Blu-ray discs. DTS compresses the same content to 768 kbps-1.5 Mbps, roughly 3x the bitrate. DTS supporters argue the higher bitrate preserves more detail. Dolby argues their perceptual coding is more efficient, delivering equivalent quality at lower bitrates. In blind listening tests, most people cannot reliably tell them apart on typical home theater equipment. The difference becomes more noticeable on high-end systems with reference-grade speakers.

Channel Support

Base Dolby Digital supports up to 5.1 channels (five speakers plus a subwoofer). DTS also supports 5.1 in its standard form. The next-generation versions expand significantly: Dolby TrueHD (lossless, up to 7.1 channels) and Dolby Atmos (object-based, up to 128 audio objects) compete with DTS-HD Master Audio (lossless, up to 7.1) and DTS:X (object-based, up to 32 objects). If you want the most immersive surround sound, both offer excellent options at the high end. For more on AC3 vs AAC encoding, see our comparison.

Streaming and Content Availability

Dolby Digital dominates streaming. Netflix, Disney+, Apple TV+, Amazon Prime, and HBO Max all support Dolby Digital and Dolby Atmos tracks. DTS streaming support is limited to Disney+ and Sony Pictures Core under the IMAX Enhanced banner. For physical media, Blu-ray discs commonly include both a Dolby and DTS track, so the format does not matter. If you primarily stream content, Dolby Digital has a clear advantage in availability.

Hardware Compatibility

Nearly every AV receiver, soundbar, and surround sound system made in the last 20 years supports both Dolby Digital and DTS. However, some TV manufacturers have dropped DTS support in recent years. LG and Samsung TVs no longer decode DTS natively, meaning you need an external receiver or soundbar. Dolby Digital remains universally supported across all devices. If you are extracting audio from video files, our Extract Audio tool supports multiple output formats.

Which Should You Choose?

For streaming, Dolby Digital and Dolby Atmos give you the widest content selection. For Blu-ray, play whichever track your disc includes; both sound great. If your receiver supports both, set it to bitstream output and let the receiver decode whichever format arrives. The real-world difference is minimal for most listeners. Focus your budget on better speakers rather than worrying about which codec is on the disc.