 
 <prompt> Wetin be di legal blocks wey no dey worry for di text? Given di previous question, write one context wey get di answer. E fit be 1 - 20 sentences. Context: <response>: Dey get some open compression formats like Opus and Vorbis wey dey available free of charge and without any known patent restrictions. Some of the newer audio compression formats, like AAC, WMA Pro and Vorbis, dey free of some limitations wey dey inherent to the MP3 format wey no fit be overcome by any MP3 encoder. 