Act I -- Vorspiel
Act I -- Transformation music
Act III -- Vorspiel
Act III -- Good Friday 'spell' and Transformation music
So far, I have not yet availed myself of the excellent 'conductor track'* facility in Notion, and it is surely a tribute to Wagner's greatness as a composer that these excerpts work as well as they do with only tempo changes (which in Notion can only fall on the downbeat of each bar). All the music was entered by hand (ie mouse-click) into the score -- not a single note was 'played', although a good deal of attention was given to articulation (ie note-lengths, and individual velocities in a few cases where I felt they were needed).
Additionally, I've recorded (this time by playing it) the piece which Wagner acknowledged as the basis for the work's overall Grundthema, also known as the Communion motif -- Liszt's Excelsior! (the opening to his cantata "Die Glocken des Strassburger Münsters") in his own arrangement for organ which he transposed up a semitone. It's played on the samples I took in 2007 from the 1820 Gerhard-orgel in Dornburg, where Liszt was a frequent visitor (I've no idea if he ever played this superb proto-Romantic instrument, but he certainly missed out if not).
*for an example of it in action, here is an arrangement for symphony orchestra of a piece by Antonio de Cabezon (from some time around 1550), the Tiento de quarto tono (#18 in the Libro de Cifra Nueva) which was my initial reason for buying the Notion3 package.
Tiento de quarto tono (adapted for orchestra)
...and for those interested, the original played on my Zuckermann Ruckers copy Tiento 18