GarageBand for iOS is more than a great DAW where you can make pro sounding recordings across 32 tracks on an iPad or iPhone..
It also shows many music theory aspects as pictorial items. This is after all what music theory is - a set of mathematical ideas based on patterns...Scales are shown on the keyboard as actual notes (if you have keyboard labels enabled in Settings - GarageBand - Keyboard Note Labels)
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Continue this lesson in the app
Install CourseHive on Android or iOS to keep learning while you move.