Download free sample SPH files for testing — NIST SPHERE Audio.
A NIST speech audio variant.
This page provides free sample SPH files you can download for testing, development and learning purposes. Each file is available in different sizes and configurations.
Use these files to test how your software handles SPH files, verify format support, or as placeholder content during development.
A NIST speech audio variant.
Yes, all sample files are free to download and use for testing, development and educational purposes.
Most SPH files can be opened with standard software for their type. Check your operating system's default applications or search for "SPH viewer" for options.
Both options provide the same file. "Download" links to an external source, while "Alternative" downloads from Vai.la servers.
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