To import iTunes playlist to Amazon music without quality loss, you can check detail guide here to import iTunes playlist to Amazon to enjoy everywhere.
Learn how to download and convert BLACKPINK songs to MP3 from Spotify/Apple/Amazon music. You can play all songs for offline listening on any music players.
We know you can't play Apple Music on Rekordbox directly, since Apple Music is DRM protected. This article is a detailed guide on how to load/transfer Apple music to Rekordbox directly.
12 Ways for you to convert Audible AA/AAX to MP3 with Audible Audiobook Converter online/offline. You can choose whether to convert audiobooks to MP3 with a free audible converter or another one.