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Convert AC3 to SPX

Convert AC3 to SPX format — 100% browser-based, no upload required.

2 cores · low tier

Drop a file here or click to select

Format will be auto-detected

About these formats

Source

AC3

Dolby Digital (AC-3)

Multi-channel audio codec by Dolby. Standard surround sound format used in DVDs, Blu-rays, and digital television.

Best for

Surround soundDVD/Blu-ray audioHome theaterBroadcasting

Advantages

  • + 5.1 surround
  • + Industry standard
  • + Good compression

Limitations

  • Lossy
  • Licensing costs
  • Surpassed by newer codecs
Target

SPX

Speex Audio

Open-source speech codec designed for voice over IP. Provides good speech compression at very low bitrates.

Best for

VoIPVoice chatSpeech compressionPodcasts

Advantages

  • + Optimized for speech
  • + Open source
  • + Very low bitrate

Limitations

  • Superseded by Opus
  • Speech only
  • Declining usage