You may be looking for:

• Wikipedia:Manual of Style/Accessibility § Animations, video, and audio content – how to include it in articles properly
• Wikipedia:Manual of Style/Captions § Non-visual media – how to identify and describe audio clips we use
• Wikipedia:Manual of Style/Music samples – their use in our articles
• Wikipedia:Manual of Style/Pronunciation – includes when and how to add audio files of pronunciations of words and names
• Wikipedia:Manual of Style/Music – on audio (of one sort) as an encyclopedia subject
• Wikipedia:Manual of Style/Visual arts – includes audio-visual arts as an encyclopedia subject

• Help:Files – covers the technical details of adding audio clips, video clips, and images
• Wikipedia:Creation and usage of media files – read this along with the one above; covers legal and other non-technical matters
• Wikipedia:Media copyright questions – a noticeboard and internal forum for clarifications
• Wikipedia:Media help, reader help for playing media files
• Wikipedia:Manual of Style/Video – a short disambiguation page like this one, but about video content

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