Convert your AAC audio files to Opus format using our free online tool. While AAC offers good quality, Opus provides superior compression efficiency and excellent sound quality at low bitrates, making it ideal for streaming, web applications, and VoIP. No Signup Required.
AAC (Advanced Audio Coding) was designed as the successor to MP3 and generally achieves better sound quality at similar bit rates. It was developed by a group including Fraunhofer, Nokia, and Dolby.
Opus is a newer audio codec created by the Internet Engineering Task Force (IETF) and is completely open and royalty-free, making it ideal for web applications and VoIP.
Both AAC and Opus use "perceptual coding" - removing sound elements that the human ear typically can't perceive, but Opus typically does this more efficiently at lower bitrates.
Opus is widely used in applications like Discord, WebRTC, YouTube, and many VoIP services due to its excellent performance at low bitrates.
Converting AAC to Opus involves a process called "transcoding" - where one compressed format is decoded and then re-encoded to another format.
During this process, the encoder analyzes the audio using psychoacoustic models to determine which audio information should be preserved in the new format.
Opus bitrates typically range from 6kbps to 510kbps, with excellent performance even at low bitrates. For speech, 16-24kbps often provides good quality, while music sounds excellent at 64-128kbps.
While audiophiles might notice differences between AAC and Opus, for most casual listening scenarios, Opus often provides better quality at lower bitrates.
Opus combines the best features from two codecs: SILK (designed for speech) and CELT (designed for music), allowing it to excel at both speech and music encoding.
Pro Tip: Converting from AAC to Opus is ideal when you need efficient audio compression for web applications, VoIP, or streaming. Opus provides excellent sound quality at low bitrates, which means smaller file sizes with minimal quality loss.
Opus is a highly efficient audio codec that provides excellent sound quality at low bitrates. While AAC offers good quality, Opus has superior compression efficiency and is ideal for streaming and web applications. Converting from AAC to Opus can reduce file size while maintaining audio quality.
Both AAC and Opus are lossy compression formats. Converting between them may cause minor quality loss as it involves decompressing and recompressing the audio. However, our converter uses optimal settings to ensure the highest possible quality while maintaining reasonable file sizes.
Conversion time depends on the original file size. Most conversions complete within a few minutes or less.
Yes, we prioritize your privacy. Your files are securely stored on our servers and automatically deleted after 24 hours to ensure complete privacy and security.
Yes, our AAC to Opus converter is completely free to use without any hidden charges. You just need to create an account to get started.
Your audio data is temporarily stored on our secure servers and automatically deleted after 24 hours for your convenience and privacy.
The maximum audio file size limit for conversion is 10MB.