Sam Rivers Trio
Studio RivBea
NY, NY
5 July 1975
WKCR-FM? > ? > Maxell UDS II cassette (recorded with Dolby C) received sometime in the mid to late 1980s > FLAC (2018), at which point the right channel of the latter third of the show was pasted over the left channel, which had been badly affected by bleed-through.

Sam Rivers (tenor and soprano saxes, piano, flute, voice)
Dave Holland (bass)
Barry Altschul (drums)

1. improvisation (92:11)

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http://www.bb10k.com/RIVERS.disc.html#75.07.05

75.07.05 • Sam Rivers Trio [BR—131:35]
July 5, 1975, 10:00pm, & 12:00midnight / Studio RivBea, New York City
—WKCR-FM Broadcast "The RivBea Tapes," August 10 + 14, 1975, + during "Studio RivBea Day" of the "Loft Jazz Festival," January 10-15, 1994
—The DJ first gives the date as June 5, then later as July 5. The Trio was in Edmonton June 3rd through 7th.

2 Sets:
1. improvisation [69:48]
 (fl section–5:10; ts section–25:48; b solo–3:05; fl+voc section–24:21; dr solo–3:19; ss section–7:04)
2. improvisation [60:39]
 (ss section–18:34; b solo–4:33; ts section–21:13; dr solo–4:24; fl section–11:55)
Sam Rivers (ts, ss, fl, voc), Dave Holland (b), Barry Altschul (dr)
{2CDr, track detailing RL 19.08.22; The SOHO Weekly News clipping Jul 3, The RivBea Archive; Village Voice Jul 7 p.91; James Lindbloom}

July 7, 1975 - The world premiere of for Colored Girls who have Considered Suicide/When the Rainbow is Enuf,
a Choreopoem by Ntozake Shange, takes place on this day at Studio RivBea. I think that's worth mentioning. —RL
—"An evening of Poetry, Music, Dance—Nfozake [sic] Shange, Paula Moss, Thulani Nkadinde, & Friends."
[Studio RivBea July Calendar mock-up, The RivBea Archive]