1First, select .opus files to convert and upload them from your computer or via the link.
2Then click the "Convert" button and wait for the conversion to complete.
3Now you can download your .m4a files individually or in a single archive.
OPUS
OPUS (Opus Audio Codec)
OPUS is an audio codec and file format of the same name designed for storing audio. OPUS provides lossy compression and was intended for streaming audio in online broadcasts. Files in the OPUS format support bitrates from 6 to 510 kbps and provide low latency during encoding, which is why it is widely used in video conferences, voice communication (VOIP), video chats, etc. OPUS also allows you to work with regular music files.
File type: Audio
File extension: .opus
Developed by: Internet Engineering Task Force & Xiph.Org Foundation
Initial release: September 11, 2012
M4A
M4A (MPEG-4 Part 14)
The M4A music format was developed by Apple. This is the format used to store audio files on the iTunes Store platform. This format is a kind of MPEG-4 container but designed specifically for encoding music. The M4A format can use both lossless and lossy compression using AAC (Advanced Audio Coding) or ALAC (Apple Lossless Audio Codec) technologies.