IOS not only has decent audio APIs (from what I hear), it even has some kind of a third-party software bus wherein apps can send audio to each other, in the manner of VST/AU: https://audiob.us. Around for many years, and apparently with many apps using it.
As a person who just won't get into the walled garden, I have to hold back tears while poking at Android apps that are trying to make decent sounds each on their own. In fact, there's Audioroute for Android, which sounds quite analogous to Audiobus, but supported basically by n-Track and four apps from one other dev: https://audioroute.ntrack.com
As a person who just won't get into the walled garden, I have to hold back tears while poking at Android apps that are trying to make decent sounds each on their own. In fact, there's Audioroute for Android, which sounds quite analogous to Audiobus, but supported basically by n-Track and four apps from one other dev: https://audioroute.ntrack.com