Audio
What is a .spx file?
A .spx file is an Ogg Multimedia Container. This is an audio format. Confusingly, this extension has been used by 4 different formats over the years — they're all listed below.
This extension has been used by more than one format
4 different formats have claimed .spx over the years, so two files with the same extension aren't necessarily the same kind of thing.
How to open a .spx file
- VLC plays almost every audio format ever made.
- Audacity opens it for editing.
The registry records this extension against Ogg Multimedia Container, Ogg Speex Codec Multimedia File, Spectrum 512 Extended and others, so software from that family is the most likely match.
How to convert a .spx file
- Export as .mp3 from Audacity or VLC for maximum compatibility.
MIME type
When a .spx file travels over the web, servers label it with one of these MIME types:
application/oggaudio/oggaudio/speexThe technical record
For archivists, developers and the merely curious: these are the PRONOM registry entries for .spx.
| Format name | Version | MIME type | PUID |
|---|---|---|---|
| Ogg Multimedia Container | — | application/ogg | fmt/944 |
| Ogg Speex Codec Multimedia File | — | audio/ogg, audio/speex | fmt/948 |
| Spectrum 512 Extended | 1 | — | fmt/1577 |
| Spectrum 512 Extended | 2 | — | fmt/1578 |