Replay Music is software that allows you to record sounds that are playing on your computer. In this way it is possible, for example, to record songs that are being played via streaming.
Having the software installed on your computer, you will be able to record songs that are being played on online radios, lives, websites such as YouTube, in short, literally from anywhere.
To record just click on the Record button, and when you've finished the song just click on Stop to stop recording. Once recorded you will be able to tag the song.