[header] How to yodel [title] Identify the break between the chest and upper registers. [step] Yodeling requires you to switch between your chest register (normal voice) and upper register (falsetto). Where normal voice transitions to falsetto, there will be a break or voiceless gap in your tone. 
You'll have to vocally jump back-and-forth across this break when yodeling. [substeps] Your normal voice will vibrate your chest and have a mellow sound.