DTS to SPH Converter

Re-encode DTS multi-channel tracks to SPH online

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DTS to SPH Made Easy

Go from DTS to SPH without technical hassle. Upload your surround audio, choose the target format, and download the result.

Built for Everyone

Whether you are an audio professional or a casual user, the converter handles your audio with the same reliability.

Secure Processing

All transfers use encryption. Uploaded files are erased after processing, and converted results are purged within 24 hours.

How to convert DTS to SPH

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose sph or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your sph file right afterwards

About formats

DTS (Digital Theater Systems) is a multi-channel audio codec originally engineered for cinema sound, now a staple of home theater and Blu-ray releases. Conceived by DTS, Inc. and first showcased theatrically alongside the 1993 film Jurassic Park, the technology delivers up to 5.1 discrete channels of surround sound at bit rates typically between 768 kbps and 1.5 Mbps. Unlike competing codecs that lean on aggressive psychoacoustic modeling, DTS allocates a higher data budget to each channel, preserving finer spatial detail and low-level dynamics. The format encodes audio using sub-band ADPCM combined with vector quantization, producing a perceptibly rich sound field. Its extended variant, DTS-HD Master Audio, adds a lossless extension layer for bit-for-bit accuracy up to 24-bit/192 kHz. Key strengths include broad hardware adoption across AV receivers, gaming consoles, and automotive infotainment systems, along with robust error concealment that masks minor disc or stream glitches. For anyone working with surround-sound content intended for physical media or high-end streaming, DTS provides a proven pathway from studio mix to living room.
Developer: DTS, Inc.
Initial release: 1993
SPH is the file extension for audio stored in the NIST SPHERE (SPeech HEader REsources) format, a standard created by the U.S. National Institute of Standards and Technology around 1990. Built for speech research, SPH files carry a 1024-byte ASCII header packed with metadata — database identifiers, channel counts, sample rates, byte ordering, and compression type — making every recording self-describing. The underlying audio is typically 16-bit linear PCM sampled at 16 kHz, though other configurations are permitted. Researchers at NIST, DARPA, and universities worldwide rely on SPH for distributing speech corpora such as TIMIT, Switchboard, and the LDC collections that underpin modern automatic speech recognition systems. A key advantage is that the human-readable header lets scripts parse recording metadata without binary decoding. The format's strict standardization also eliminates ambiguity when sharing datasets across institutions and platforms. Because SPH files store uncompressed PCM, they preserve full audio fidelity — critical when training acoustic models where even small artifacts can skew results.
Initial release: 1990

Frequently Asked Questions

Why convert DTS to SPH?

DTS surround audio converted to SPH becomes usable in studio environments and specialized academic audio tools.

What programs can open SPH?

You can play SPH using NIST/Sphere tools, HTK, and speech recognition research software.

Is there quality loss in the conversion?

Quality depends on SPH capabilities. The converter preserves as much fidelity as the target encoding permits at your chosen settings.

Can I convert multiple DTS tracks at once?

Yes — upload several DTS files and convert them all to SPH in a single batch. No need to process each one individually.

Is my audio data kept private?

Uploaded DTS files are deleted immediately after conversion. The resulting SPH outputs are removed from our servers within 24 hours.

Does this work on mobile devices?

Yes. The converter is fully browser-based and works on smartphones and tablets — no app download required for DTS to SPH conversion.