If you have a YTM subscription, it does not make sense to play in Outer tune. Any YTM Streaming client streams in 128 kbps whilst YTM Premium streams at 256 kbps when set at High.

One can download songs at 256 kbps though if they have YTM Premium via yt-dlp using setcookiesoption. This is useful if someone has large custom playlists where searching via Soulseek is a chore.