.SPX File

The spx files extension is mainly used for Speex encoded audio format, based on open source/free software patent-free project, developed by Xiph.Org Foundation.

Speex is based on CELP and is designed to compress voice at bitrates ranging from 2 to 44 kbps. Some of Speex's features include:

• Narrowband (8 kHz), wideband (16 kHz), and ultra-wideband (32 kHz) compression in the same bitstream
• Intensity stereo encoding
• Packet loss concealment
• Variable bitrate operation (VBR)
• Voice Activity Detection (VAD)
• Discontinuous Transmission (DTX)
• Fixed-point port
• Acoustic echo canceller
• Noise suppression

Files with spx file extension may be found as audio files in the special Speex free open source audio codec used mainly to encode speech.

How to open:

Use VLC media player or any other media player with support of SPX format.

How to convert:

Possibly may be converted to other audio formats.