Wikipedia:Music samples 

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Music samples can be a valuable addition to articles about bands, musical styles, and genres. They can illustrate the particular instruments or musical elements in a song in a way that a text description cannot. However, usage of such samples needs to comply with copyright law and Wikipedia's guidelines. The limitations on length and quality described here apply only to fair use samples; free content samples are not subject to these limitations.

Guidelines

Inclusion in article:

{{Sound sample box align right|Music sample:}}
{{Listen
|filename=Bob_Dylan_-_All_Along_The_Watchtower.ogg
|title=Bob Dylan "All Along the Watchtower" (1967)
|description=16 second sample from Bob Dylan's "All Along the Watchtower".
|format=[[Ogg]]}}
{{sample box end}}

How much is 10%

Original (mm:ss) 0:30 1:00 1:30 2:00 2:30 3:00 3:30 4:00 4:30 5:00 More than 5:00
Maximum length of sample (mm:ss) 0:03 0:06 0:09 0:12 0:15 0:18 0:21 0:24 0:27 0:30 0:30

See also