Tracklist Hide Credits

1	El Nuevo Baretto Backing Vocals [On The First Part Of The Tune] – Adalberto Santiago, Pete BonetBacking Vocals [On The Last Half Of The Tune] – Pete Bonet, Ray BarrettoTambourine, Bells [Cencerro / Bongo Bell] – Adalberto Santiago	6:49
2	Mercy, Mercy, Baby Backing Vocals – Jimmy Sabater, Willie Torres	2:42
3	Acid Lead Vocals [Spanish], Claves – Adalberto Santiago	5:05
4	A Deeper Shade Of Soul	2:42
5	The Soul Drummers Backing Vocals – Jimmy Sabater, Willie Torres	3:46
6	Sola Te Dejaré Backing Vocals – Jimmy Sabater, Pete Bonet, Willie TorresMaracas – Adalberto Santiago	3:48
7	Teacher Of Love Backing Vocals – Jimmy Sabater, Willie Torres	2:26
8	Espíritu Libre Bells [Cha-cha Bell] – Adalberto SantiagoVocals [English Vocals], Guiro, Percussion [Quijada De Burro / Donkey Jaw Bone] – Pete Bonet	8:25

Credits

• Arranged By – Gil Lopez (tracks: 6), Ray Barretto (tracks: 1 to 5, 7, 8)
• Artwork By [Graphic Format Design] – Louise Hilton
• Artwork By [Graphic Montage & Digital Output] – New Line Design, Inc.
• Artwork By [Original Lp Album Cover Design By] – Izzy Sanabria
• Bass [Ampeg Baby Bass] – Bobby "Big Daddy" Rodriguez*
• Congas, Written-By, Music Director – Ray Barretto
• Executive Producer – Jerry Masucci
• Photography [Original Lp Photos By] – Marty Topp
• Piano – Louis Cruz
• Producer – Ray Barretto
• Timbales – Orestes Vilato
• Trumpet – René López, Roberto Rodriguez

Barcode and Other Identifiers

• Barcode: 4520227017422

Other versions

Category	Artist	Title (Format)	Label	Category	Country	Year
SLP 346	Ray Barretto	Acid ‎(LP, Album, Gol)	Fania Records	SLP 346	US	1968
LP 346	Ray Barretto	Acid ‎(LP, Mono, Gol)	Fania Records	LP 346	US	1968
LP 7290	Ray Barretto	Acid ‎(LP, Album, Mono, RE)	Palacio	LP 7290	Venezuela	Unknown
BE 899.007-H	Ray Barretto	Acid ‎(LP, Album)	Blue Elephant	BE 899.007-H	Netherlands	1969
FANIA1039592	Ray Barretto	Acid ‎(CD, Album, RE)	Fania Records	FANIA1039592	Europe	2006

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