You're looking for information on the sounds in Windows 10 Build 10074!
: Several daily notification audio files, including the User Account Control (UAC) alert, were refreshed. windows 10 build 10074 sounds
Microsoft introduced a suite of fresh system sounds for common actions like notifications and system alerts. You're looking for information on the sounds in
Build 10074's sounds were highly dynamic. They used complex stereo field mixing (where sounds moved from left to right) and deep bass frequencies. Beta testers on cheap laptop speakers reported clipping and distortion. The sounds also caused a memory leak in certain Realtek audio drivers. Rather than fix the drivers, Microsoft simplified the sounds to generic MIDI-like tones. windows 10 build 10074 sounds