In dulci jubilo, BWV 608
Johann Sebastian Bach
Little Organ Book 

T2 - bar 26: First note G transposed up an octave.
T2 - bars 27, 28: Last three notes of bar 27 and first note of bar 28 transposed up an octave.
T2 - bar 33: First note A transposed up an octave.
T2 - bars 35, 36: Last three notes of bar 35 and first note of bar 36 transposed up an octave.