Additional audio format support (Opus)

Is your feature request related to a problem? Please describe

m4a or mp3 are only supported format, but Opus is a fantastic successor which maintains same quality at a much reduced size.

Describe the solution you'd like

Opus files - fully open codec that supports incredibly small audio files. https://opus-codec.org/

Describe alternatives you've considered

Use m4a or mp3

Additional context

Thank you for the consideration. Opus support would reduce burden on your servers by shrinking file size!