Toccata super Magnificat

Besides the three preludes I published a few days ago (see here: https://partitura.org/index.php/johann-effler-3-preludes/) manuscript Ms 001, owned owned by the Bibliothek der Hochschule für Musik und Darstellende Kunst, Frankfurt, contains one more work by Johann Effler: the 'Toccata super Magnificat'. This toccata features a very short introduction (only 7 bars long), followed by a bicinium (except for the last 4 bars, where a third voice is introduced). The choral melody of " Meine Seele erhebet den Herrn" is played with the right hand, while the left hand plays a largely freestyle accompaniment. Only in the bar between the two phrases of the melody is material from the choral melody heard in the left hand.
The manuscript uses a way of notating notes in the great octave that I am not familiar with. I'm therefore not sure I've identified them all correctly.


Score availagle here: https://partitura.org/index.php/johann-effler-toccata-super-magnificat