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Audio Conversion

Convert MP3 to AU Online — Free

Fast, free MP3 to AU converter. No registration required.

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2M+ archivos convertidos

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Comience a convertir al instante

Funciona en todas partes

Cualquier navegador, cualquier dispositivo

Cómo convertir

1

Upload your .mp3 file by dragging it into the upload area or clicking to browse.

2

Choose your output settings. The default settings work great for most files.

3

Click Convert and download your .au file when it's ready.

¿Qué es MP3?

MP3 is the most popular audio format worldwide. It uses lossy compression to reduce file size while maintaining acceptable audio quality for most listeners.

Detalles del formato

Nombre completo
MPEG Audio Layer III
Extensión
.mp3

Características principales

  • Universal compatibility
  • Small file sizes
  • Streaming support
  • ID3 tag support

¿Qué es AU?

AU is an audio format created by Sun Microsystems. It's one of the oldest digital audio formats, commonly used on Unix and Java platforms.

Detalles del formato

Nombre completo
Sun Microsystems Audio
Extensión
.au

Características principales

  • Unix standard
  • Java audio
  • Simple format
  • Legacy support

MP3 vs AU

CaracterísticaMP3AU
Nombre completoMPEG Audio Layer IIISun Microsystems Audio
Extensión.mp3.au
Ideal paraUniversal compatibilityUnix standard

Preguntas frecuentes

Converting between lossless formats preserves perfect quality. When converting to lossy formats, our optimized encoding minimizes any audible difference. You can adjust bitrate to control quality vs. file size.
We preserve ID3 tags, album art, and metadata when both MP3 and AU support them. Some metadata may not transfer between incompatible formats.
Pro users can batch convert multiple audio files simultaneously. Free users convert one file at a time with up to 5 free conversions per day.
We support all standard sample rates from 8kHz (voice) up to 192kHz (studio quality). The default preserves your source file's sample rate.
Yes. Our audio converter handles music, podcasts, voice memos, and audiobook files. For podcasts, we recommend MP3 at 128-192kbps for the best balance of quality and file size.

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