Band

• Scott Russo - vocals
  Singing
  Singing is the act of producing musical sounds with the voice, and augments regular speech by the use of both tonality and rhythm. One who sings is called a singer or vocalist. Singers perform music known as songs that can be sung either with or without accompaniment by musical instruments...
  
  
• Steve Morris - guitar
  Guitar
  The guitar is a plucked string instrument, usually played with fingers or a pick. The guitar consists of a body with a rigid neck to which the strings, generally six in number, are attached. Guitars are traditionally constructed of various woods and strung with animal gut or, more recently, with...
  
  
• Rob Brewer - guitar
• Wade Youman - drums
  Drum kit
  A drum kit is a collection of drums, cymbals and often other percussion instruments, such as cowbells, wood blocks, triangles, chimes, or tambourines, arranged for convenient playing by a single person ....
  
  , percussion
  Percussion instrument
  A percussion instrument is any object which produces a sound when hit with an implement or when it is shaken, rubbed, scraped, or otherwise acted upon in a way that sets the object into vibration...
  
  

Additional musicians

• Micah Albao - bass guitar
  Bass guitar
  The bass guitar is a stringed instrument played primarily with the fingers or thumb , or by using a pick....
  
  
• Rick Parashar
  Rick Parashar
  Rick Parashar is a music producer who came to prominence in the early 1990s through his work with grunge bands such as Pearl Jam, Alice in Chains, and Blind Melon. Parashar co-founded London Bridge Studio with his brother, Raj...
  
   - piano
  Piano
  The piano is a musical instrument played by means of a keyboard. It is one of the most popular instruments in the world. Widely used in classical and jazz music for solo performances, ensemble use, chamber music and accompaniment, the piano is also very popular as an aid to composing and rehearsal...
  
  , keyboards
  Keyboard instrument
  A keyboard instrument is a musical instrument which is played using a musical keyboard. The most common of these is the piano. Other widely used keyboard instruments include organs of various types as well as other mechanical, electromechanical and electronic instruments...
  
  , tambura
  Tambura
  The tambura, tanpura, or tambora is a long-necked plucked lute . The body shape of the tambura somewhat resembles that of the sitar, but it has no frets – only the open strings are played to accompany other musicians...
  
  , percussion
• Geoff Turner - DJ
• Erik Aho - additional guitar on "Cailin"
• Brandon Boyd
  Brandon Boyd
  Brandon Charles Boyd is an American musician, author, and visual artist. He is best known as the lead vocalist of the American rock band Incubus.-Early Life and Incubus:...
  
   - spoken vocals and didgeridoo
  Didgeridoo
  The didgeridoo is a wind instrument developed by Indigenous Australians of northern Australia around 1,500 years ago and still in widespread usage today both in Australia and around the world. It is sometimes described as a natural wooden trumpet or "drone pipe"...
  
   on "418"
• Mike Einziger
  Mike Einziger
  Michael Aaron Einziger is a Grammy-nominated musician known as the co-writer and guitarist of the alternative rock band Incubus. Einziger is widely known as an innovator and enthusiast of the use of pedalboard guitar effects during live concerts, and was voted #41 in Total Guitar's top 100...
  
   - additional guitar on "418"
• Craig Yarnold - additional backing vocals on "Holiday"

Production

• Rick Parashar – producer
  Record producer
  A record producer is an individual working within the music industry, whose job is to oversee and manage the recording of an artist's music...
  
  , engineer, mixing
• Andy Wallace – mixing of "Sorry"
• Jon Plum – assistant producer, engineer, and mixing
• Geoff Ott – second engineer
• Kelly Gray – additional mixing on "Underground" and "418"
• Jon Mathias – engineer of "Holiday"
• George Marino – mastering
  Audio mastering
  Mastering, a form of audio post-production, is the process of preparing and transferring recorded audio from a source containing the final mix to a data storage device ; the source from which all copies will be produced...