On November 23, 2004, “Record Collection” label released “A Sphere in the Heart of Silence”, an album by John Frusciante and Josh Klinghoffer. It was recorded in April 2004, and was produced by John Frusciante and Josh Klinghoffer.
- John Frusciante – lead and backing vocals, vocal treatments, acoustic and electric guitar, piano, bass, white noise, synthetic strings, drum treatments, synthesizer, programing, design
- Josh Klinghoffer – lead and backing vocals, guitar, piano, arp string ensemble, guitar, bass, synthesizers, drum loops, drums, one note synth
- Ryan Hewitt – engineer, mixing
- Chris Reynolds – assistant
- Jason Gossman – assistant
- Bernie Grundman – mastering
- Mike Piscitelli – design
- Lola Montes Schnabel – photography
- Dave Lee – equipment technician
All tracks by John Frusciante and Josh Klinghoffer.
- The Afterglow
- At Your Enemies
- Surrogate People
- My Life