If you are getting notifications from OpticalAnalog, then your Mac is infected with adware. OpticalAnalog is adware for Mac.
OpticalAnalog changes setting in your Mac. First, OpticalAnalog installs a browser extension in your browser. Then, after OpticalAnalog hijacks your browser, it modifies settings in the browser. For example, it changes the default home page, modifies search results, and displays unwanted pop-ups in your browser.