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What is 3GA?

3GA (audio/3gpp) uses lossy compression optimized for mobile voice recordings, phone memos. 3GPP Audio, compressed audio from mobile phone recordings

What is SPX?

SPX files are built around lossy compression. Designed for voip telephony, voice chat, speech compression, they use the audio/speex MIME type and typically range from varies by content.

When Should You Use 3GA vs SPX?

Use 3GA When...

Reach for 3GA when your priority is mobile voice recordings, phone memos — its efficient compression makes sharing fast and storage minimal.

Use SPX When...

Reach for SPX when your priority is voip telephony, voice chat, speech compression — its efficient compression makes sharing fast and storage minimal.

3GA vs SPX: Key Differences

  • •3GA and SPX diverge on compression: lossy compression for the source, lossy compression for the target.
  • •Both formats share lossy compression, so quality behavior is similar across the two — file size differences come from algorithm efficiency rather than compression philosophy.
  • •How transparency is handled: SPX does not support alpha channels — transparent areas in the source will become opaque.
  • •File sizes: 3GA files typically range N/A and SPX files N/A.
  • •Use case fit: 3GA targets mobile voice recordings, phone memos and SPX targets voip telephony, voice chat, speech compression — your choice depends on which workflow stage you are serving.

Advantages of 3GA

  • ✓3GA uses lossy compression tailored for Mobile voice recordings, phone memos.
  • ✓3GA is supported natively on virtually every device, browser, and operating system.
  • ✓3GA files are compact and quick to transfer, even over slow connections.
  • ✓3GA integrates seamlessly with all major creative tools and workflows.

Advantages of SPX

  • ✓SPX applies lossy compression specifically calibrated for VoIP telephony, voice chat, speech compression.
  • ✓SPX enjoys broad native support across operating systems, browsers, and creative tools alike.
  • ✓SPX delivers impressive compression ratios, shrinking files dramatically while keeping visual quality high.
  • ✓You will find SPX support built into virtually every tool that handles VoIP telephony, voice chat, speech compression — no plugins or converters needed.

Common Use Cases for 3GA to SPX Conversion

  • Sound design
  • Language learning
  • Professional broadcasting
  • Video game audio assets
  • Film soundtracks
  • Radio commercials

Industry Applications

AccessibilityVoice-overAudio ArchivingGame AudioFilm Post-productionAudiobook Publishing

Best Practices for 3GA to SPX Conversion

  • →Converting 3GA to SPX: SPX preserves full audio fidelity — ideal for archiving master recordings
  • →Normalize audio levels before conversion for consistent playback volume
  • →SPX excels in professional audio workflows
  • →Always keep a backup of your original files before converting
  • →Choose the appropriate quality settings for your specific use case

Related Article

Video Compression Guide: Reduce File Size Without Losing Quality

Learn more about 3GA and SPX formats in our detailed guide.

Troubleshooting 3GA to SPX Conversion

  • !Clicks or pops in the converted SPX → sample rate conversion can introduce artifacts; use a clean multiple of the source rate
  • !SPX file has silence at the beginning or end → trim the source 3GA file before converting to avoid unnecessary padding
  • !Stereo image collapsed after converting 3GA to SPX → verify that the converter preserves channel mapping for multichannel audio
  • !The converted SPX clips or distorts at peaks → reduce the gain or apply a limiter before conversion to prevent hard clipping

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About 3GA and SPX

3GA

3GA (3GA) - 3GPP Audio, compressed audio from mobile phone recordings. Best for mobile voice recordings, phone memos.

SPX

SPX (SPX) - Speex, open-source speech codec for VoIP and voice. Ideal for voip telephony, voice chat, speech compression.

Format Comparison

CompressionLossy → Lossy
TransparencyN/A
Use CaseConvert from mobile voice recordings, phone memos to voip telephony, voice chat, speech compression
File Size~Standard file sizes after conversion

FAQs

Is converting 3GA to SPX free?

Yes, GoConvertFile offers free conversion of 3GA to SPX for files up to 100MB. No registration required.

How long does it take to convert 3GA to SPX?

Most 3GA to SPX conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.

What is SPX best used for?

SPX is ideal for voip telephony, voice chat, speech compression. Speex, open-source speech codec for VoIP and voice

What file size should I expect after converting 3GA to SPX?

File size after 3GA to SPX conversion depends on the content complexity and quality settings. Both formats use similar compression approaches so sizes are comparable.

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