Radio Documentary Listens To Musicians' Devotion  Posted: April
03, 1996  Six years ago, when he plumbed the life and music of
jazz great Miles Davis in an exhaustive 8-hour radio
documentary, producer Steve Rowland came away with the holy
grail of broadcasting - a George Peabody Award.  Now comes
Rowland's latest project, an even more ambitious 13-hour
documentary for public radio called The Music Makers, which
examines the creativity and devotion to music of six influential
or visionary contemporary acts: Patti LaBelle, Carlos Santana,
George Clinton, The Neville Brothers, the late Frank Zappa and
an emerging Philadelphia hip-hop group called The Roots.  The
Music Makers, which is airing on all three local public radio
outlets, began last night on WXPN-FM (88.9). Over the coming
weeks, 'XPN will air the series in two-hour blocks on Tuesday
nights from 9-11 p.m. WHYY-FM (90.9) will broadcast the series
in one-hour segments on Wednesdays, beginning tonight at 10. And
WRTI-FM (90.1), which will air it in one-h