Headphone Dust, 2004
Journeys into the spaces beyond death, the other world, by traveling into deeper and deeper layers of silence, where the voices in the air crystallize out of their solution in the æther:
Electronic voice phenomena (EVP) are electronically captured sounds that resemble speech, but are not the result of intentional voice recordings. Common sources include static, stray radio transmissions and background noise. Some people claim these sounds are of paranormal origin, while there are natural explanations such as apophenia (finding significance in insignificant phenomena), auditory pareidolia (interpreting random sounds as voices in their own language), equipment artefacts, or simple hoaxes. Recordings of electronic voice phenomena are often created from background sound by increasing the gain (i.e. sensitivity) of the recording equipment.
Tracks by Porcupine Tree lead singer Steven John Wilson, remixed by Victoriana-obsessed audio surrealist Andrew Liles. While all of the sources used aren't necessarily technical EVP, there is the generally disturbing (at least to me) theme of ghostly voices on the edge of audibility and intelligibility. Beware listening at dark.
Check out recordings of EVP's & other spirit voices/medium transcriptions on the excellent Okkulte Stimmen compilation over at Allegory of Allergies.