Here's a listing of each week's length and range for what I have completed and generally what it will be for the remainder.
Week 1 6:40 Minutes Low F# - Middle C
Week 2 10:36 Minutes Low F# - Middle C
Week 3 16:23 Minutes Low F# - Middle C
Week 4 18:21 Minutes Low F# - Middle C
Week 5 21:03 Minutes Low F# - E above Middle C
Week 6 23:30 Minutes Low F# - E above Middle C
Week 7 26:37 Minutes Low F# - G above Middle C
Week 8 28:00 Minutes Low F# - G above Middle C
Week 9 30:52 Minutes Pedal F - G above the staff
Week 1 6:40 Minutes Low F# - Middle C
Week 2 10:36 Minutes Low F# - Middle C
Week 3 16:23 Minutes Low F# - Middle C
Week 4 18:21 Minutes Low F# - Middle C
Week 5 21:03 Minutes Low F# - E above Middle C
Week 6 23:30 Minutes Low F# - E above Middle C
Week 7 26:37 Minutes Low F# - G above Middle C
Week 8 28:00 Minutes Low F# - G above Middle C
Week 9 30:52 Minutes Pedal F - G above the staff