M4R to OPUS Converter
Convert your m4r files to opus online & free
How to convert m4r to opus
Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.
Choose "to opus"
Choose opus or any other format you need as a result (more than 200 formats supported)
Download your opus
Let the file convert and you can download your opus file right afterwards
MPEG 4 Ringtones Audio
M4R - is a digital multimedia container format used to store audio in mono channel mode. This format is suitable for store ringtones and it is widely used by Apple iPhone for its ringtones. Needless to say that M4R and M4A formats shares many similar features.
Opus (audio format)
Opus is a lossy audio coding format developed by the Xiph.Org Foundation and standardized by the Internet Engineering Task Force, designed to efficiently code speech and general audio in a single format, while remaining low-latency enough for real-time interactive communication and low-complexity enough for low-end ARM3 processors. Opus replaces both Vorbis and Speex for new applications, and several blind listening tests have ranked it higher-quality than any other standard audio format at any given bitrate until transparency is reached, including MP3, AAC, and HE-AAC.