Perform duties for the greatest benefit of the public and restrain from seeking self-gain and from being an instrument of any group of people.

UNESCO: Communication and Information

Those who spent their leisure time playing a musical instrument were happier than the group as a whole, but they also made less money.

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He's added several strings to create a seven-string instrument, and has created the first all-ngoni group, featuring four different-sized instruments, including a bass ngoni, also his invention.

NPR: Bassekou Kouyate And Ngoni Ba: Griot Music