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Convert Opus to AU
Convert Opus to AU 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
Opus
Opus Audio CodecModern open-source audio codec excelling at voice and music. Best quality-per-bitrate of any lossy codec, and the standard for WebRTC.
Best for
VoIP/callsStreamingLow-latency audioWeb communication
Advantages
- + Best quality-per-bit
- + Open source
- + Ultra low latency
- + WebRTC standard
Limitations
- − Limited device support
- − Newer format
- − Less metadata support
Target
AU
Sun/NeXT AudioSimple audio format from Sun Microsystems. Originally used in Unix systems and Java audio. Typically stores µ-law compressed audio.
Best for
Unix/Java audioLegacy systemsSimple audio storage
Advantages
- + Simple format
- + Java support
- + Compact for telephony
Limitations
- − Outdated
- − Low quality
- − Limited use