SPX File Documentation

Overview

Feature Value
File Extension .spx
Format Type Audio
Compression Lossy
Codec Speex
Container Ogg
MIME Type audio/ogg
Developed by Xiph.Org Foundation
Primary Use Speech Audio
Sample Rate 8 kHz to 48 kHz
Channels Mono or Stereo
Bitrate Variable
Quality Adjustable from 0 to 10
Frame Size 20 ms to 250 ms
Variable Bit Rate (VBR) Supported
Average File Size Reduction Approx. 50-70% smaller than MP3
Metadata Supports tagging
Encryption Supports encryption
License BSD-like license
Pros Good compression, suited for voice
Cons Not universally compatible with all media players
Software Support VLC, Winamp, Foobar2000, and more