What is the SPX format?

1. spxSpeex
2. 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.

More spx Help

1. Convert spx to another format!
2. Convert other formats to spx!