Convert AAC to OPUS

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AAC vs OPUS Format Comparison

Aspect	AAC (Source Format)	Opus (Target Format)
Format Overview	AAC Advanced Audio Coding AAC is a lossy digital audio compression format designed as the successor to MP3, offering better sound quality at similar bit rates. Widely used in streaming, digital music stores, and mobile devices. Lossy Compressed	Opus Opus Opus is an open‑source, lossy audio codec combining SILK and CELT to deliver low‑latency, high‑quality audio across a wide range of bit rates. Lossy Compressed
Technical Specifications	Sample Rates: 8kHz - 96kHz Bit Rate Modes: CBR, VBR Profiles: LC, HE, HEv2, LD, ELD Channels: mono (1), stereo (2), multichannel (up to 48) Extensions: .aac, .m4a, .mp4, .3gp	Sample Rates: 8kHz - 48kHz Bit Rate Modes: CBR, VBR Bit Rates: 6–510 kbps Channels: mono (1), stereo (2), multichannel (up to 255) Extensions: .opus, .ogg, .webm
Advantages	High audio quality at the same bitrates as MP3 Supports VBR Low computational complexity for decoding Wide support on modern devices	Excellent audio quality at low and high bit rates Very low latency (as low as 5 ms) Seamless speech/music optimization Robust to packet loss No patent licensing fees for most use cases
Disadvantages	Lossy compression—some audio data is permanently discarded Limited compatibility with older devices Commercial licensing may apply	Less universal hardware support than MP3/AAC Higher CPU usage for encoding/decoding Complex codec design complicates custom implementations
Compatibility	Excellent: iOS, Spotify, YouTube, Modern Android devices Good: VLC, Windows Media Player, Modern browsers Limited: Older car stereos, Legacy audio equipment	Excellent: Discord, Firefox, Chrome, WhatsApp, Spotify Good: VLC, FFmpeg, iOS (with libraries) Limited: Legacy media players, Older car stereos
Common Uses	Music streaming (Spotify, Apple Music) Digital downloads (iTunes Store) Podcasts and audiobooks Audio tracks for video files	Real‑time communication (VoIP, video conferencing) Interactive streaming and game audio Music streaming at variable bit rates WebRTC applications and browsers

Why Convert AAC to OPUS?

Converting AAC to Opus delivers ultra-low latency and exceptional quality across bit rates, making it perfect for real‑time communications and adaptive streaming, while remaining open-source and royalty-free.