File Type Ogg Vorbis Speex File IconOgg Vorbis Speex File
File Format Standard (developed by Xiph.Org)
Usage Open manually
Popularity ★ ★ ☆ ☆ ☆  Uncommon

An SPX file is a Speex audio file saved within an Ogg Vorbis container. Speex is an open source patent-free audio format designed for speech compression. It supports variable bitrate (VBR) encoding and several features not found in other audio codecs. Some examples include embedded encoding, intensity stereo encoding, and voice activity detection.

Info About Ogg Vorbis

Ogg Vorbis is not a software program, but an open-source multimedia format. It is designed to store multiple types of compressed audio and video data in a single file. Since the format is open-source, multimedia software developers can freely incorporate the format into their programs. The Ogg Vorbis format is currently used by several media programs for Macintosh, Windows, and Linux platforms.

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Updated March 15, 2010
Information from the PC File Extensions Reference