Just listen! Here's step by step written directions: 1: 3 hums, first hum should be at your regular level tone voice thingy (im not a vocal coach i got this off the clock app), second hum should be medium-ish like, and third should be the lowest you can go. 2: repeat for a bit, you should be getting slighlty deeper with each hum 3: e u p h o r i a hope this helps! yes voice reveal ik my voice is so hot /lh /j i have a generally medium ish voice range so it should take a bit more humming for those who have a higher voice range sksksksk