@Diell.it wrote:
thanks, (correct me if I'm wrong) but I do not think solve the problem, because the source of the signal remains the microphone, I would like to analyze the sounds of windows that are transmitted to the speakers.
Do you mean that you want to analyze the sound being generated by your PC and output by its own speakers? You're not going to be able to do that if your PC's only audio recording source is a built-in microphone. Most desktop PCs will have a line-in audio input jack, in which case you could connect a patch cable between the line-out and line-in jacks to route the computer's audio output back into its input for analysis, but many laptops now don't have a line-in jack, just a built-in microphone and possibly a headset microphone jack. In that case you'll need to add a USB audio adapter with line-in and line-out jacks to your system.
Edited to add: I didn't think to search until after I posted, but there does exist a "virtual audio cable", a loopback audio device driver you can install which looks like audio input and output hardware to windows, but actually just routes the output back to the input without ever touching any hardware. Check out LoopBeAudio: https://www.nerds.de/en/loopbeaudio.html
Edited again to add: Okay, there may be an even simpler solution if your audio hardware supports it, which is to enable the "Stereo Mix" recording device. Try this: https://www.howtogeek.com/howto/39532/how-to-enable-stereo-mix-in-windows-7-to-record-audio/
