Studio albums:
1971 Spectrum Part One (as Spectrum) Milesago (Spectrum)
1973 Warts Up Your Nose (as Indelible Murtceps) Testimonial (split album by Spectrum and Indelible Murtceps)
1999 Spill (as Spectrum Plays the Blues)
2004 No Thinking (as Spectrum Plays the Blues)
2008 Breathing Space (as Spectrum)
2009 Breathing Space Too (as Spectrum)
2011 Breathing Space As Well (as Spectrum)
Live album:
1973 Terminal Buzz (split album by Spectrum and Murtceps)
Compilations:
1984 Red Orange Yellow Green Blue Indigo Violet (covers both Spectrum and Indelible Murtceps material)
1991 Ghosts: Post-Terminal Reflections (both Spectrum and Murtceps)