It had never occurred to me the crossover between iPhone ringtones and Apple’s Emagic acquisition.
Speculation within, but I wouldn’t doubt it:
In the very long list of Software instruments is the high quality Orchestra Marimba. This GarageBand / Logic Pro Software instrument marimba is nearly identical to what has become the famous iPhone marimba ringtone. So much so that there are versions that were faithfully reproduced in GarageBand where one could not distinguish a difference with the correct filters and effects. Thus I and a number of people, some inside of Apple, have concluded that Dr. Lengeling may have directly or indirectly created the marimba iPhone ringtone on a Mac using GarageBand / Logic Pro. However this is not apparently officially discussed or otherwise revealed.