In music as in love, one + one can add up to not two but a new and greater one. On Heart Songs two of the world's greatest guitarists, Tommy Emmanuel and John Knowles, make this clear. Both are masters of their instrument, honored by the iconic Chet Atkins with the rare designation of CGP (Certified Guitar Players). Emmanuel has twice been voted "Best Acoustic Guitarist" by readers of Guitar Player Magazine and honored as both a "Member of the Order of Australia" and an official "Kentucky Colonel". Knowles is a Grammy winner, a member of the National Thumb Picker's Hall of Fame, and editor of the respected FingerStyle Quarterly.

Bare Bones is a 2010 acoustic live album by Canadian rock singer Bryan Adams. It was recorded live at various locations on his "Bare Bones Tour" earlier in the year. It was certified gold in India a year later. Bare Bones is an inspired collection of minimally arranged hits culled from Adams’ impressive body of work spanning three decades. Recorded in spring of 2010 during his "Bare Bones Tour," the disc captures a raw Adams, featuring only his distinctive voice and guitar, accompanied on select songs by keyboardist Gary Breit, lending a newfound appreciation and perspective to what many consider some of the most beloved songs in pop/rock music.

Carlos Alberto Mestre (born August 3, 1952 in Buenos Aires, Argentina) mostly known by his stage name Nito Mestre, is an Argentine musician, founding member –along with Charly García– of Sui Generis, member of PorSuiGieco, bandleader of Nito Mestre y los Desconocidos de Siempre and a recording solo artist. Sui Generis, was initially formed in 1969 by Charly García (keyboards and vocals), Nito Mestre (guitar, flute and vocals), Rolando Fortich (bass guitar), Juan Belia (guitar), Alberto Rodriguez (drums) and Carlos Piegari (vocals). Later on, Sui Generis became a duo as everyone left except for García. After the band split in 1975, Nito Mestre formed a new band called "Nito Mestre y los Desconocidos de Siempre" with María Rosa Yorio on vocals, Rodolfo Gorosito on guitar, Alfredo Toth on bass, Ciro Fogliatta on keyboards and Juan Carlos "Mono" Fontana as a drummer. In the early 80s, Nito pursued a solo career.

Almost every one of Peter Gabriel’s best-laid plans winds up going awry, and so it was with Scratch My Back, his 2010 collection of orchestral covers of some of his favorite songs. He had hoped to have the artists he covered return the favor by interpreting his songs but that project never got off the ground, so he pursued New Blood, an album where he turned that orchestra upon his own songs. New Blood is in every way a companion piece to Scratch My Back; it’s cut from the same aesthetic cloth, it's austere and cerebral without being chilly, it finds emotion within intellect.

Unarmed – Best of 25th Anniversary is the 25th Anniversary celebration album by the German power metal band Helloween. It is a compilation of re-recorded versions of Helloween songs in an acoustic/symphonic style. It includes a 70-piece Prague Symphony Orchestra performing "The Keeper's Trilogy", a 17-minute medley consisting of the songs "Halloween", "Keeper of the Seven Keys" and "The King for a 1000 Years". Many guest musicians are featured on the tracks. Commenting on the album on 2011, the bass guitarist Markus Grosskopf said, “It's just like we've been asked what to do [regarding their 25th anniversary], if we're going to do fine remakes or re-masters, but then sell the old stuff people get at home anyway just a slightly different sound, it wouldn't make any sense to us so we just wanted to give people something new. It was interesting and fun to play a bass like this that you can hear on that record because I never did this.”