From WILL - Live and Local -

University of Illinois vocal jazz ensembles

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(Duration: 1:00:39)

In its entry on vocal jazz, Wikipedia says jazz singing can be defined as an instrumental approach to the voice, though that seems quite a limited definition to me. You can explore contemporary vocal jazz singing in person during a concert in Urbana Wednesday night by the University of Illinois vocal jazz ensembles--and you can hear them live on today's edition of "Live and Local."