.spxaudio/speex

Speex (.spx)

Speex is an open-source audio codec designed specifically for speech. Offers good quality at very low bitrates.

Quick Facts

File Extension
.spx
MIME Type
audio/speex
Category
Audio
Full Name
Speex

What is Speex?

Speex is an open-source audio codec designed specifically for speech compression. Developed by the Xiph.Org Foundation, it aims to provide high-quality audio at very low bitrates, making it ideal for internet telephony and voice applications. Unlike general-purpose codecs like MP3, Speex optimizes its algorithms for the human voice, ensuring clarity even when bandwidth is limited.

The format supports variable bitrates and multiple sampling rates, allowing flexibility across different network conditions. Although it has largely been superseded by the Opus codec in many modern applications, Speex remains significant in legacy systems and specific low-bandwidth environments where its patent-free status and efficiency for speech are still valued.

Technical Specifications

DeveloperXiph.Org Foundation
First Released2002
TypeAudio Codec
CompressionLossy
Max Resolution48 kHz
Color DepthN/A

Pros & Cons

+Advantages

  • •Optimized specifically for human speech
  • •Patent-free and open-source
  • •Efficient at very low bitrates
  • •Supports variable bitrate encoding

−Disadvantages

  • •Limited hardware support compared to MP3
  • •Superseded by the Opus codec
  • •Poor performance with non-speech audio

Common Use Cases

Voice over IP (VoIP) applications

Low-bandwidth voice communication

Legacy audio archiving

Embedded speech recognition systems

Convert to Speex

Convert other files to .spx format.

.jpg.spx

Convert JPEG (.jpg) files to Speex (.spx) format. Transform your JPG files to SPX quickly and easily with File ConverterX — completely free.

.png.spx

Convert PNG (.png) files to Speex (.spx) format. Transform your PNG files to SPX quickly and easily with File ConverterX — completely free.

.webp.spx

Convert WebP (.webp) files to Speex (.spx) format. Transform your WEBP files to SPX quickly and easily with File ConverterX — completely free.

.gif.spx

Convert GIF (.gif) files to Speex (.spx) format. Transform your GIF files to SPX quickly and easily with File ConverterX — completely free.

.mp4.spx

Convert MP4 (.mp4) files to Speex (.spx) format. Transform your MP4 files to SPX quickly and easily with File ConverterX — completely free.

.mp3.spx

Convert MP3 (.mp3) files to Speex (.spx) format. Transform your MP3 files to SPX quickly and easily with File ConverterX — completely free.

.wav.spx

Convert WAV (.wav) files to Speex (.spx) format. Transform your WAV files to SPX quickly and easily with File ConverterX — completely free.

.flac.spx

Convert FLAC (.flac) files to Speex (.spx) format. Transform your FLAC files to SPX quickly and easily with File ConverterX — completely free.

.svg.spx

Convert SVG (.svg) files to Speex (.spx) format. Transform your SVG files to SPX quickly and easily with File ConverterX — completely free.

.avif.spx

Convert AVIF (.avif) files to Speex (.spx) format. Transform your AVIF files to SPX quickly and easily with File ConverterX — completely free.

.mov.spx

Convert MOV (.mov) files to Speex (.spx) format. Transform your MOV files to SPX quickly and easily with File ConverterX — completely free.

.mkv.spx

Convert MKV (.mkv) files to Speex (.spx) format. Transform your MKV files to SPX quickly and easily with File ConverterX — completely free.

.avi.spx

Convert AVI (.avi) files to Speex (.spx) format. Transform your AVI files to SPX quickly and easily with File ConverterX — completely free.

.ogg.spx

Convert OGG Vorbis (.ogg) files to Speex (.spx) format. Transform your OGG files to SPX quickly and easily with File ConverterX — completely free.

.aac.spx

Convert AAC (.aac) files to Speex (.spx) format. Transform your AAC files to SPX quickly and easily with File ConverterX — completely free.

.m4a.spx

Convert M4A (.m4a) files to Speex (.spx) format. Transform your M4A files to SPX quickly and easily with File ConverterX — completely free.

.tiff.spx

Convert TIFF (.tiff) files to Speex (.spx) format. Transform your TIFF files to SPX quickly and easily with File ConverterX — completely free.

.bmp.spx

Convert BMP (.bmp) files to Speex (.spx) format. Transform your BMP files to SPX quickly and easily with File ConverterX — completely free.

.txt.spx

Convert Plain Text (.txt) files to Speex (.spx) format. Transform your TXT files to SPX quickly and easily with File ConverterX — completely free.

.stl.spx

Convert STL (.stl) files to Speex (.spx) format. Transform your STL files to SPX quickly and easily with File ConverterX — completely free.

.webm.spx

Convert WebM (.webm) files to Speex (.spx) format. Transform your WEBM files to SPX quickly and easily with File ConverterX — completely free.

.wma.spx

Convert WMA (.wma) files to Speex (.spx) format. Transform your WMA files to SPX quickly and easily with File ConverterX — completely free.

.opus.spx

Convert Opus (.opus) files to Speex (.spx) format. Transform your OPUS files to SPX quickly and easily with File ConverterX — completely free.

.ico.spx

Convert ICO (.ico) files to Speex (.spx) format. Transform your ICO files to SPX quickly and easily with File ConverterX — completely free.

.jxl.spx

Convert JPEG XL (.jxl) files to Speex (.spx) format. Transform your JXL files to SPX quickly and easily with File ConverterX — completely free.

.apng.spx

Convert APNG (.apng) files to Speex (.spx) format. Transform your APNG files to SPX quickly and easily with File ConverterX — completely free.

.3gp.spx

Convert 3GP (.3gp) files to Speex (.spx) format. Transform your 3GP files to SPX quickly and easily with File ConverterX — completely free.

.m4v.spx

Convert M4V (.m4v) files to Speex (.spx) format. Transform your M4V files to SPX quickly and easily with File ConverterX — completely free.

.aiff.spx

Convert AIFF (.aiff) files to Speex (.spx) format. Transform your AIFF files to SPX quickly and easily with File ConverterX — completely free.

.3g2.spx

Convert 3G2 (.3g2) files to Speex (.spx) format. Transform your 3G2 files to SPX quickly and easily with File ConverterX — completely free.

.ac3.spx

Convert AC3 (.ac3) files to Speex (.spx) format. Transform your AC3 files to SPX quickly and easily with File ConverterX — completely free.

.amf.spx

Convert AMF (.amf) files to Speex (.spx) format. Transform your AMF files to SPX quickly and easily with File ConverterX — completely free.

.amr.spx

Convert AMR (.amr) files to Speex (.spx) format. Transform your AMR files to SPX quickly and easily with File ConverterX — completely free.

.asf.spx

Convert ASF (.asf) files to Speex (.spx) format. Transform your ASF files to SPX quickly and easily with File ConverterX — completely free.

.au.spx

Convert AU (.au) files to Speex (.spx) format. Transform your AU files to SPX quickly and easily with File ConverterX — completely free.

.caf.spx

Convert CAF (.caf) files to Speex (.spx) format. Transform your CAF files to SPX quickly and easily with File ConverterX — completely free.

.dds.spx

Convert DDS (.dds) files to Speex (.spx) format. Transform your DDS files to SPX quickly and easily with File ConverterX — completely free.

.dfpwm.spx

Convert DFPWM (.dfpwm) files to Speex (.spx) format. Transform your DFPWM files to SPX quickly and easily with File ConverterX — completely free.

.dts.spx

Convert DTS (.dts) files to Speex (.spx) format. Transform your DTS files to SPX quickly and easily with File ConverterX — completely free.

.dv.spx

Convert DV (.dv) files to Speex (.spx) format. Transform your DV files to SPX quickly and easily with File ConverterX — completely free.

.eac3.spx

Convert E-AC3 (.eac3) files to Speex (.spx) format. Transform your EAC3 files to SPX quickly and easily with File ConverterX — completely free.

.f4v.spx

Convert F4V (.f4v) files to Speex (.spx) format. Transform your F4V files to SPX quickly and easily with File ConverterX — completely free.

.fits.spx

Convert FITS (.fits) files to Speex (.spx) format. Transform your FITS files to SPX quickly and easily with File ConverterX — completely free.

.flv.spx

Convert FLV (.flv) files to Speex (.spx) format. Transform your FLV files to SPX quickly and easily with File ConverterX — completely free.

.gsm.spx

Convert GSM (.gsm) files to Speex (.spx) format. Transform your GSM files to SPX quickly and easily with File ConverterX — completely free.

.gxf.spx

Convert GXF (.gxf) files to Speex (.spx) format. Transform your GXF files to SPX quickly and easily with File ConverterX — completely free.

.ivf.spx

Convert IVF (.ivf) files to Speex (.spx) format. Transform your IVF files to SPX quickly and easily with File ConverterX — completely free.

.j2k.spx

Convert JPEG 2000 (.j2k) files to Speex (.spx) format. Transform your J2K files to SPX quickly and easily with File ConverterX — completely free.

.m4b.spx

Convert M4B (.m4b) files to Speex (.spx) format. Transform your M4B files to SPX quickly and easily with File ConverterX — completely free.

.mlp.spx

Convert MLP (.mlp) files to Speex (.spx) format. Transform your MLP files to SPX quickly and easily with File ConverterX — completely free.

.mmf.spx

Convert SMAF (.mmf) files to Speex (.spx) format. Transform your MMF files to SPX quickly and easily with File ConverterX — completely free.

.mp2.spx

Convert MP2 (.mp2) files to Speex (.spx) format. Transform your MP2 files to SPX quickly and easily with File ConverterX — completely free.

.mpeg.spx

Convert MPEG (.mpeg) files to Speex (.spx) format. Transform your MPEG files to SPX quickly and easily with File ConverterX — completely free.

.mxf.spx

Convert MXF (.mxf) files to Speex (.spx) format. Transform your MXF files to SPX quickly and easily with File ConverterX — completely free.

.nut.spx

Convert NUT (.nut) files to Speex (.spx) format. Transform your NUT files to SPX quickly and easily with File ConverterX — completely free.

.pam.spx

Convert PAM (.pam) files to Speex (.spx) format. Transform your PAM files to SPX quickly and easily with File ConverterX — completely free.

.pbm.spx

Convert PBM (.pbm) files to Speex (.spx) format. Transform your PBM files to SPX quickly and easily with File ConverterX — completely free.

.pcx.spx

Convert PCX (.pcx) files to Speex (.spx) format. Transform your PCX files to SPX quickly and easily with File ConverterX — completely free.

.pgm.spx

Convert PGM (.pgm) files to Speex (.spx) format. Transform your PGM files to SPX quickly and easily with File ConverterX — completely free.

.ppm.spx

Convert PPM (.ppm) files to Speex (.spx) format. Transform your PPM files to SPX quickly and easily with File ConverterX — completely free.

.psd.spx

Convert PSD (.psd) files to Speex (.spx) format. Transform your PSD files to SPX quickly and easily with File ConverterX — completely free.

.rm.spx

Convert RealMedia (.rm) files to Speex (.spx) format. Transform your RM files to SPX quickly and easily with File ConverterX — completely free.

.roq.spx

Convert RoQ (.roq) files to Speex (.spx) format. Transform your ROQ files to SPX quickly and easily with File ConverterX — completely free.

.sbc.spx

Convert SBC (.sbc) files to Speex (.spx) format. Transform your SBC files to SPX quickly and easily with File ConverterX — completely free.

.sgi.spx

Convert SGI (.sgi) files to Speex (.spx) format. Transform your SGI files to SPX quickly and easily with File ConverterX — completely free.

.sox.spx

Convert SoX (.sox) files to Speex (.spx) format. Transform your SOX files to SPX quickly and easily with File ConverterX — completely free.

.stp.spx

Convert STEP (.stp) files to Speex (.spx) format. Transform your STP files to SPX quickly and easily with File ConverterX — completely free.

.swf.spx

Convert SWF (.swf) files to Speex (.spx) format. Transform your SWF files to SPX quickly and easily with File ConverterX — completely free.

.tta.spx

Convert TTA (.tta) files to Speex (.spx) format. Transform your TTA files to SPX quickly and easily with File ConverterX — completely free.

.voc.spx

Convert VOC (.voc) files to Speex (.spx) format. Transform your VOC files to SPX quickly and easily with File ConverterX — completely free.

.w64.spx

Convert W64 (.w64) files to Speex (.spx) format. Transform your W64 files to SPX quickly and easily with File ConverterX — completely free.

.wv.spx

Convert WavPack (.wv) files to Speex (.spx) format. Transform your WV files to SPX quickly and easily with File ConverterX — completely free.

.y4m.spx

Convert YUV4MPEG (.y4m) files to Speex (.spx) format. Transform your Y4M files to SPX quickly and easily with File ConverterX — completely free.

Frequently Asked Questions

It is an audio file encoded with the Speex codec, typically used for speech.

Need to convert Speex files?

File ConverterX supports converting .spx files to and from dozens of formats — completely free.

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