It's Arbor Day, Charlie Brown [Complete Soundtrack v2] - Vince Guaraldi Trio

Original Score By Vince Guaraldi Trio
Original Broadcast March 16, 1976
Featuring Seward McCain (bass) and Jim Zimmerman (drums).

"What is Arbor Day? Oh, that's simple. That's the day when all the ships come sailing into the arbor!"

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SYNOPSIS

Sally has been assigned by her teacher to write about the history and meaning of Arbor Day. Linus offers to help her and suggests the library will provide them with the needed information. They learn Arbor Day was created by J. Sterling Morton, an early conservationist.
Linus reads aloud from a book that states "Arbor Day points out to both children and adults the need to protect certain areas of our natural forests and woodlands." Arbor means tree, and trees are planted in celebration of Arbor Day.

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THE SOUNDTRACK

The musical score features the final compositions and recorded performances of Vince Guaraldi. 47-year-old Guaraldi died suddenly several hours after completing the soundtrack for this special.

As 1976 began, Guaraldi brought McCain and Zimmerman to the Wally Heider studio. The trio spent the next month laying down the tracks.
The baseball-themed storyline lent itself to the revival of the "baseball theme", not heard since "A Boy Named Charlie Brown". Guaraldi's trio extemporized on this cue several times during the show building to a climax when Lucy accepted a challange to try for a homerun.

A few of these riffs on the "Baseball Theme" marked Guaraldi's sole use of acoustic piano; the rest of the score was done with an electric keyboard and synthesizer. The special's main theme, a gentle waltz also was heard repeatedly as the story progressed.

You may notice that "Seeds For Thought" has a striking similarity to "Joe Cool" and "Rain, Gentle Rain" is similar to "Rain, Rain Go Away".
The musical background was constant and for the most past formless; agreeable electric keyboard chord progressions that suggested atmosphere rather than leaving viewers with any catchy melodic hooks.
(credit Derrick Bang - "Guaraldi At The Piano")

UPDATE
Thanks to Malcolm Dewberry for picking out a few little faux pas.
"Corrected Lucy's Home Run" 1 and 2 and "Don't Forget the Shovel".
Included two little singing tracks by Vinnie Dow.

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YOUTUBE TRACKLIST

00:00 01 Rerun's Lament (00 : 47)
00:47 02 89 Bottles Of Beer (00 : 11)
00:58 03 Rerun's Lament2 (00 : 34)
01:33 04 Ships Sail Into Arbor (00 : 56)
02:29 05 Laughter in the Library (00 : 48)
03:18 06 Flatten Platten (00 : 48)
04:06 07 Young Man's Fancy (02 : 56)
07:03 08 Jay Sterling Morton Jazz (01 : 28)
08:32 09 We're the Visiting Team (01 : 21)
09:54 10 Seeds for Thought (00 : 31)
10:25 11 Don't Forget the Shovel (02 : 36)
13:01 12 Sprinkle Your Bird (02 : 23)
15:25 13 Flatten Platten2 (01 : 36)
17:02 14 Snoopy at Bat (01 : 11)
18:14 15 Lucy's Home Run1 (01 : 27)
19:41 16 Take Me Out To The Ballgame (00 : 06)
19:47 17 Lucy's Home Run2 (01 : 22)
21:10 18 Rain Gentle Rain (01 : 10)
22:20 19 Laughter in the Library2 (00 : 38)
22:59 20 Happy Arbor Day Charlie Brown (00 : 33)
23:32 21 Lucy's Home Run3 (00 : 33)
24:05 END