The easiest way to tell is look at the audio file on your computer. If the filename ends in .mp3, .aac, or .ogg, it’s a lossy file.

With several clicks, users can record computer audio from YouTube videos. Here are some advanced recording features to help you effectively extract high-quality audio from YouTube: ...

The audio recorder was introduced in Windows 11 as a replacement for the previous Voice Recorder program. It enables audio recordings via integrated microphones or headsets.

You can quickly convert any video or audio file into an MP3, or any video into an MP4, by using Microsoft PowerToys.