This is an arrangement, published in 1991 and constructed by someone called Henk de Vlieger, of some of Wagner's music from the Ring. Apparently, the renowned conductor Lorin Maazel had already done something similar, but I do not know who his arrangement compares with Vlieger's. Vlieger's adventure lasts an hour on this disc, which was recorded in 2007.
Vlieger's work is subtitled `an orchestral adventure', so it is not a formal symphony using Wagner's themes; rather, the music flows naturally from one section into the other. However, the sleevenotes (by Maarten Brandt) relate how Vlieger has created a symphonic structure within the music's parts: thus, sections one to four, five and six, seven to nine, and ten to fourteen correspond to a traditional four-movement symphonic format, with the `scherzo' being the second rather than third movement.
Equally, the aforementioned four parts take music directly from the respective four parts of the Ring. We thus open with music arranged from the `Vorspiel' of `Das Rheingold' and end with `Brunnhildes Opfertat' from `Gotterdammerung'. Half the music comes from the final opera. The sleevenotes explain that Vlieger did this because the final opera "constitutes an enormous recapitulation of everything preceding it."
Does it work? Not really. And there is no reason why it should: would you make a symphony from `Don Giovanni' or `Peter Grimes'? I felt a little cheated that within seven minutes of the start of this adventure I am already in Nibelheim. And the supposed pseudo-symphonic format is quite bogus. Take the seven-minute scherzo: it opens with the `Ride of the Valkyries' and closes with the `Magic Fire' music, but there is no intimation of a trio, and no repeat of the Valkyries. Instead we segue straight into the `Waldweben' from `Siegfried', forming the opening to an `adagio'. So this arrangement is neither one thing nor the other: it is, instead, `an adventure'.
A decent `Siegfried-Idyll' fills the rest of the disc.