[PaulDavisThe1st]

That might be true for something where the phrase "business logic" is applicable.

But in my niche (realtime audio software), there is underlying data in the system that changes over time independently of events. So there is "something else to it".

[mbrodersen]

I use the term “Business Logic” when I talk about the code that decides what is now true when an event has happened. I real-time audio software it would be the logic that decides which sample to play next and what the (say) audio volume should be now. The non-logic code is the code that read events from the environment (user input) and changes the environment (the audio hardware).

[smashed]

Not meant to be pedantic, just playing devil's advocate, but isn't the real time audio bitstream just a continuous source of events that gets blended with the rest of the application state like active filters and what not?

[PaulDavisThe1st]

Individual samples do not in any significant sense constitute events. The only thing that really pays them any attention is metering, and the result of that process is only displayed to the user periodically (i.e. something roughly equivalent to the screen refresh rate).

Even higher level objects, such as what are various called "clips" or "regions" or "events" frequently pay no role in any type of event notification system. In some designs, the boundaries of such objects may play a somewhat event-like fole.