how to download audio without transcoding?

[foldfree]

Since Telegram support most audio formats nowadays such as opus, aac-m4a, ogg... transcoding everything to mp3 seems not necessary.
I would rather avoid a lossy to lossy conversion and get the best quality/size version of the file.

This is the default yt-dlp behavior.

However, i don't understand how should I write it down in the YTDL_OPTS config file.

If i replace FINAL_AUDIO_FORMAT by 'best' I get:
join() argument must be str, bytes, or os.PathLike object, not 'NoneType'

What should I write instead?
Thank you!!

[tropicoo]

Right now this won’t work. I will need to change the logic to keep and upload original audio.