4 tracks. Running time 43:14 The fourth disc in the An Opera for Four Fusion Works series is Act Four: The Bowing Harmony featuring Steven Wilson on vocals. In this series Dirk Series - better known as Vidna Obmana – takes sounds from a collaborator to rework and recycle them. On this album Steven's voice is gradually twisted into a less vocal form alongside Vidna's synth, electric guitar, and other treatments. Curiously the tracks are named from out of sequence Roman numerals. Overtone style singing starts the album off in “II” whose doleful refrains verge on being a lament. High pitched tones appear to come and go randomly while another tone pushes and pulls listlessly in the backdrop like a siren produced by a depleting battery. In the next track “IV” it's as if we've entered a cavernous space inhabited by spirits. A multitude of almost angelic voices cascade in sighing tones which appear to echo harmonically. Barely discernible at first is a walking note, this becomes faster and louder while the voices morph to a more agitated state. A very eerie atmosphere is created, enhanced towards the end by a crawling crackling sound. Closing off the album is the longest track “III” at nearly twenty four minutes. Barely audible tones are suddenly replaced by synthetic vocals gracefully washing here and there in an aural dance. By the end they're distorted by harsh drones and metallic whines. The Bowing Harmony is one of those unusual works best described by the old saying “it's an acquired taste”. First impressions of it are dubious, yet over time it can be appreciated as a strangely listenable addition to the ambient music realm. If ever there was an album to make one imagine stepping into the world of spirits and lament, this is it.