haQ attaQ has posted a video that is basically a mini documentary about the Evolution of the iOS Music making platform. Here's Jakob Haq's description of it...
From Apple introducing the first iPhone, to AUM and AUv3 Multi-bus routing, here's the Evolution of the iOS Music platform from 2007 to 2021. It's been 14 years in the making and a lot of stuff has happened since it all began. The introduction of the AppStore, The first iPhone Synthesizer, Audiobus, Inter App Audio, the first iPad Pro, Audio Unit Extensions, I've collected all vital miles stones in a time-line spanning over a decade and I'm finally able to share it with the iOS Music community.
haQ attaQ has shared all the source links in a blogpost.
Dirty drums and PolyBrute
With new looping firmware for Cosmos
Mini Hydrasynth with Poly AT
Classic single VCO mono synth