Convert audio: m4b to opus

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.m4b

In addition the relevant M4A file, a M4B format is a M4A file that can be bookmarked and are therefore better used for audio books and podcasts. This MPEG-4 Audio file is a layer file that is becoming the new standard for audio compression and is often used as the audio in MPEG-4 movies. Learn more about m4b

.opus

OPUS files are found on the Golden Orchard Apple II cd-roms and are audio formats. OPUS files are a totally open source, highly versatile audio codec and has been designed to support the transport over the internet, but can also be used by storage and streaming applications. Mime-type: application/octet-stream Learn more about opus