Perhacs also sang backing vocals on "Freely" from Devendra Banhart's Smokey Rolls Down Thunder Canyon and features in Prefuse 73's track "Rain Edit" (Interlude) from the album Surrounded by Silence.
Unlike the 2006 EP Security Screenings, Preparations is considered the proper follow-up to 2005's collaboration-heavy Surrounded by Silence.
However, Security Screenings is not considered to be a follow-up to Surrounded by Silence.
Dead Silence | The Silence of Dean Maitland | The Sound of Silence | The Conspiracy of Silence | Relative Silence | Dead silence | Where Silence Has Lease | Two Minutes Silence | Surrounded by Silence | Sunday Silence | Suicide Silence | Land of Silence and Darkness | Two Minutes Silence (1933 film) | Silence Becomes You | Lorna's Silence | Enjoy the Silence | Vatican's silence during the Holocaust | Twelve Year Silence | The Beckoning Silence | The Angry Silence | Silence (song) | Silence Is Madness | Silence is Madness | Silence | silence | ''Le Silence'', Allegory of Poilu | Hymns to the Silence | Hell and Silence | Great Silence | City of Silence |