Beep creation

Solves Objective: Find out how the Beeps are created

What is this?

This objective requires us to find out how the beeps and sounds are created in the GUI. This is building off of the same result from Finding Functions Via Sound

Answer

This program uses the Windows API Beep() function. As analyzed in the import table and verified by analyzing the disassembly of the individual tabs. Code example below.

mov     edx, 3B6h       ; dwDuration
mov     ecx, 0C8h       ; dwFreq
call    cs:Beep <-----------------------|
mov     cs:dword_140156D58, 13h         | Windows API call imported from Kernel32
                                        | https://learn.microsoft.com/en-us/windows/win32/api/utilapiset/nf-utilapiset-beep