Convert M4R to OPUS
Convert M4R files to OPUS format online for free. No upload required, 100% private.
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Converting between two lossy formats (M4R → OPUS) involves re-encoding, which may cause additional quality loss. For best results, convert from the original source file when possible.
About M4R
M4R
iPhone Ringtone Format
M4R is the ringtone format used by Apple iPhones. It is essentially an M4A file with a different extension, limited to 40 seconds for ringtones.
Typical Use Cases
Pros
- • Native iPhone support
- • Easy to create from M4A
- • Good audio quality
Cons
- • iPhone only
- • 40 second limit
- • Requires iTunes for transfer
About OPUS
OPUS
Opus Interactive Audio Codec
Opus is a modern lossy audio codec optimized for both speech and music. It offers excellent quality at low bitrates and is ideal for real-time communication.
Typical Use Cases
Pros
- • Excellent low-bitrate quality
- • Low latency
- • Open source
- • Versatile
Cons
- • Limited device support
- • Newer format
- • Not all players support it