Convert AC3 to SPX
Fast, free AC3 to SPX conversion — works in any browser
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ac3
AC3 — Dolby Digital Audio (5.1 Surround)
| File extension | .ac3 |
|---|---|
| File category | audio |
| Programs | VLC media player Windows Media Player Kodi MPlayer foobar2000 |
| Tech description | https://en.wikipedia.org/wiki/Dolby_Digital |
| MIME type | audio/ac3 |
| Developer | Dolby Laboratories |
AC3 is the audio codec used in Dolby Digital, a surround sound standard developed by Dolby Laboratories and introduced in 1991. AC3 files typically carry up to 6 audio channels — front left/right, center, surround left/right, and a low-frequency effects (LFE) subwoofer channel — commonly known as 5.1 surround sound. The format is widely used on DVDs, Blu-rays, and digital television broadcasts. An AC3 stream can be stored as a standalone file or embedded in video containers such as MKV, AVI, or VOB. Supported by VLC, Kodi, foobar2000, and most modern home theatre receivers.
spx
An audio file with recorded voice messages
| File extension | .spx |
|---|---|
| File category | audio |
| Programs | VLC media player Audacity foobar2000 MPlayer |
| Tech description | https://en.wikipedia.org/wiki/Speex |
| MIME type | audio/ogg; codecs=speex audio/x-speex |
| Developer | Jean-Marc Valin (Xiph.Org) |
This format extension is one of the Speex Audio formats. It is an open-source codec developed by Xiph.Org. Used for creating voice messages and transmitting voice over packet-based networks with a low level of security. It is an audio file with recorded voice messages that are packaged in an OGG file. Only certain media players can open it.
FAQ
How to convert SPX to AC3?
Upload your SPX file, select AC3 as the output format, and click Convert. The converted file will be ready to download in seconds — no account or installation required.
How long does it take to convert SPX to AC3?
Most SPX files convert in seconds. Larger files may take up to a few minutes depending on size and internet speed. You can track the progress bar in real time during conversion.
Is it safe to convert SPX files online?
Yes. All uploaded SPX files and converted AC3 results are automatically deleted from our servers within 1 hour after conversion. We do not store, share, or access your files.
Can I convert SPX on iPhone or Android?
Yes, our converter works on all devices and operating systems — iPhone, iPad, Android, Windows, and macOS. Open the site in your mobile browser, upload the SPX file and convert to AC3 without installing any app.
