Struggling With Chapter 4, Doubling And Transposing Your Sound

Hello,

Thanks in advance to anyone who can help.

I find getting the patches for chapter 4 very challenging. I'm not sure how to keep practicing for this. Should I just keep repeating chapter 4 lessons until I start passing them?

I still struggle between Pulse and Saw waves, it's not always clear to me, and identifying the pulse width of the waves is also hard.

Did anyone else struggle with this? How did you overcome it?

Please and thank you so much!