Watched WWDC 2019 keynote; Brush up my understanding of Fast Fourier transform

WTH this catch(...) is???

    catch (CAXException &e) {
        NSLog(@"Error returned from setupAudioSession: %d: %s", (int)e.mError, e.mOperation);
    }
    catch (...) {
        NSLog(@"Unknown error returned from setupAudioSession");
    }

Found out it’s C++ feature, it’s kind of default case for catch clauses.

Working with audio this week. Just checked if I understand dB correctly.

Trying to brush up my understanding of Fast Fourier transform read 1 and 2.

Watched online WWDC 2019 keynote and Platforms State of the Union. Downloaded Xcode 11 and played with it and SwiftUI.