[3] In 1988, Coulter teamed up with four other San Francisco Bay instrumentalists to form an ensemble called Orison, the name taken from the Middle English word for prayer or invocation.
Their combinations of harp, guitar, cello, oboe, English horn, flute, and percussion produced an ethereal musical signature of "poignant beauty.
Coulter characterized the album as "pristine ... capturing a range of nuances and gentle moods that are rarely heard on recordings of Celtic music."
In 1999, Coulter and Verdery concluded the trilogy with the album Crooked Road, which again featured traditional Irish and Scottish melodies, as well as some contemporary songs.
According to Coulter, their friendship had become "a musical agreement on how arrangements should go and how best to manage such matters as intonation and improvisation, to release the instrument's full range of feeling.
William Coulter's love of traditional melody is framed by a classical sense of composition and realized with an impeccable and sensitive guitar technique.
William's well exercised craftsmanship and his unusual ability to direct the voices of the guitar as if they were a steel-string choir make the music come to life in his hands.
[2]In 2004, Coulter released the album The Road Home, his first truly solo recording since he began exploring Celtic music over twenty years ago.
Coulter also included a tribute to one of his teenage musical idols with his beautiful solo guitar arrangement of Neil Young's "After the Gold Rush."