HOW TO Make music on your iPhone or iPad
Pick what to play
Launch GarageBand and create a new song. Let’s pick an instrument from this, the Sound Browser. Swipe left or right for different instrument types and tap the icons to select a specific one such as Alchemy Synth.
Make some noise
We picked this synth because you can play it with one finger. Select Fast Gate from the middle section and hold down a piano key to hear a bubbling synth pattern. To record it, press the red circle icon before pressing the key(s).
See your stuff
Tap on the third icon from the very top left to enter Tracks view. The green block is what you just recorded. Drag the ends to trim it, double–tap and select Loop. This repeats the recording to fill the entire song section.