What do all these musicians have in common?

These are all respected recording artists. You will recognize many of their names. They play folk, blues, rock, bluegrass, gospel, country, jazz, reggae, old-time and even classical music. Many of them are legends, but chances are you don't know a lot of them.

Aaron Neville * Aerosmith * Al Dexter * Al Kooper * Alex Chilton * Alfred Karnes * Alison Krauss * Ally McBeal * Almeda Riddle * Amy Grant * Andrews Sisters * Andy Griffith * Arlo Guthrie * Asleep at the Wheel * Bad Livers * Barbara Dane * Beatles * Ben Harper * Ben Winship * Bernice Reagon * Big Bill Broonzy * Big Country * Big Joe Williams * Bill Black * Bill Broonzy * Bill Gaither * Bill Monroe * Bill Morrissey * Bill Staines * Bill Wyman * Billie Jo Spears * Bing Crosby * Blind Lemon Jefferson * Blue Sky Boys * Bo Diddley * Bob Dylan * Bob Gibson * Bob Marley * Bob Seger * Bob Weir * Bonnie Raitt * Boston Camerata * Boxcar Willie * Brenda Lee * Brian Keane * Brooks & Dunn * Brooks Williams * Brownie McGhee * Bruce Hornsby * Bruce Molsky * Bruce Springsteen * Bryan Bowers * Bryn Terfel * Buck Owens * Buck Owens * Buckwheat Zydeco * Buell Kazee * Bukka White * Burl Ives * Burnett & Rutherford * Carl Perkins * Carolyn Hester * Carter Family * Chad Mitchell Trio * Charlie Daniels * Charlie Monroe * Charlie Moore * Charlie Patton * Cheryl Wheeler * Chesapeake * Christopher Parkening * Chuck Berry * Cisco Houston * Clarence Ashley * Cliff Richard * Clint Howard & Fred Price * Cochran Brothers * Connie Dover * Conway Twitty * Coon Creek Girls * Count Basie * Country Gentlemen * Country Joe McDonald * Craig Chaquico * Crooked Still * Cub Koda * Danny O’Keefe * Daryle Singletary * Dave Alvin * Dave Clark Five * Dave Evans * Dave Mason * Dave van Ronk * David Francey * David Grisman & John Hartford * David Holt * David Johanson * David Lindley * Deana Carter * Del Shannon * Dion * Dirk Powell * Doc & Merle Watson * Dock Boggs * Dolly Parton * Don Henley * Don Williams * Donovan * Doug Kershaw * Dr. Hook & the Medecine Show * Dry Branch Fire Squad * Dwight Yoakam * Earl Scruggs * Ed McCurdy * Elvis Costello * Elvis Presley * Elvis Presley * EmmyLou Harris * Eric Andersen * Eric Clapton * Erik Darling * Ernest Stoneman * Ernest Tubb * Etta Baker * Everly Brothers * Faces * Faron Young * Fats Domino * Flatt & Scruggs * Floyd Cramer * Flying Burrito Brothers * Frank Proffitt * Frank Sinatra * Fred McDowell * Freddy Fender * Furry Lewis * Gary Stewart * Gene Vincent * George Jones * George Tucker * Giles * Gillian Welch * Glenn Miller * Glenn Yarbrough * Grand Funk Railroad * Grateful Dead * Grayson & Whitter * Greenbriar Boys * Gregory Isaacs * Gumbohead * Hank Williams * Hank Williams Jr. * Hank Williams III * Happy Traum * Harry & Jeanie West * Harry Belafonte * Harry Connick Jr. * Harry Manx * Hedy West * Hobart Smith * Holy Modal Rounders * Hot Rize * Howard Fishman * Hoyt Axton * Humble Pie * Iain Matthews * Ian & Sylvia * Incredible String Band * Isaac Hayes * J.E. Mainer * Jackson Five * James Montgomery * James Taylor * Janis Joplin * Jars of Clay * Jean Redpath * Jean Ritchie * Jerry Garcia * Jerry Lee Lewis * Jesse Colin Young * Jesse Winchester * Jim & Jesse * Jim Kweskin * Jim Reeves * Jim Ringer & Mary McCaslin * Jimmie Dale Gilmore * Jimmy Buffett * Jimmy Martin * JJ Cale * Jo-El Sonnier * Joan Baez * Jody Stecher & Kate Brislin * Joe Cocker * Joe Ely * John Anderson * John Fahey * John Fogarty * John Hammond * John Hartford * John Lee Hooker * John Lennon * John McCutcheon * John Mellencamp * John Prine * John Renbourn * Johnny Cash * Johnny Copeland * Johnny Horton * Johnny Paycheck * Johnny Rivers * Johnson Mountain Boys * Josh White * Judy Collins * Karl & Harty * Kate Rusby * Katy Moffatt * Kelly Harrell * Kevin Roth * Kingston Trio * Kossoy Sisters * Kruger Brothers * Larry Sparks * Leadbelly * Lee Greenwood * Lefty Frizzell * Leon Russell * Les Baxter * Lightnin’ Hopkins * Little Richard * Loggins & Messina * Long John Baldry * Lonnie Donegan * Lonnie Mack * Lou Ann Barton * Louis Jordan * Louvin Brothers * Lucinda Williams * Lynyrd Skynyrd * Mac Wiseman * Mance Lipscomb * Maria Muldaur * Marley’s Ghost * Martin Simpson * Marty Robbins * Marty Stuart * Mel Tillis * Merle Haggard * Merle Travis * Michael Martin Murphy * Mick Jagger * Mike Seeger * Molly Andrews * Mongo Santamaria * Mormon Tabernacle Choir * Mose Allison * Motosapien * Muddy Waters * New Coon Creek Girls * New Lost City Ramblers * New Riders of the Purple Sage * Nina Simone * Nitty Gritty Dirt Band * Norman Blake * Oak Ridge Boys * Odetta * Ola Belle Reed * Osborne Brothers * Pat Boone * Pat Donohue * Paul Anka * Paul Revere & the Raiders * Paul Robeson * Peggy Seeger * Pentangle * Pete Seeger * Pete Wernick * Peter & Gordon * Peter Green * Peter Ostroushko * Peter Paul & Mary * Peter Rowan * Petra Haden * Petula Clark * Phil Keaggy * Pleasure Box * Professor Longhair * Queen Ida * Quickdraw String Band * Raffi * Ralph Stanley * Ramblin’ Jack Elliott * Ray Legere * Reba McIntyre * Red Clay Ramblers * Reno & Smiley * Richard Thompson * Ricky Skaggs & Tony Rice * Riders in the Sky * Riley Baugus * Rob Ickes * Robin & Linda Williams * Roger McGuinn * Rolling Stones * Ronnie Hawkins * Ronnie Milsap * Rory Block * Rory Gallagher * Roscoe Holcomb * Roy Acuff * Roy Clark * Roy Drusky * Roy Orbison * Rusty York * Sally Rogers * Sam Bush * Sammie Kershaw * Sandy Denny * Shack Shakers * Sheryl Crow * Simmons Family * Simon & Garfunkel * Simple Gifts * Skip Gorman * Skip James * Slaid Cleaves * Sleepy LaBeef * Slim Harpo * Soglasie Choir * Solas * Sonny Terry & Brownie McGhee * Sons of the Pioneers * Spider John Koerner * Steeleye Span * Steve James * Stevie Ray Vaughan * T-Bone Walker * Tab Benoit * Taj Mahal * Tara Nevins * Tarbox Ramblers * Ted Nugent * Ten Years After * Tennessee Ernie Ford * Tex Ritter * The Animals * The Bar-Kays * The Byrds * The Challengers * The Dale Warland Singers * The Dillards * The Duhks * The Dylan Project * The Everly Brothers * The Freight Hoppers * The Golden Ring * The Grateful Dead * The Incredible String Band * The Mammals * The Mavericks * The New Lost City Ramblers * The Shaw Brothers * The Strawbs * The Tarriers * The The * The Troggs * The Ventures * The Weavers * The White Stripes * Threadgill Troubadours * Three Dog Night * Tim O’Brien * Tom Jones * Tom Paxton * Tom Petty * Tom Rush * Tom Russell * Toni Price * Tony & Irene Saletan * Tony Rice * Tony Trischka * Traffic * Trini Lopez * Troublesome Creek * Van Morrison * Vassar Clements * Wade Mainer * Warren Zevon * Waylon Jennings * Willie Nelson * Wilma Lee & Stoney Cooper * Woody Guthrie * Yo-Yo Ma * Young Tradition

They also have something else in common...

They have recorded a song that is on the amazing Harvey Reid & Joyce Andersen epic box-set book & recording "The Song Train."