Audials Tunebite Platinum is an app that lets you capture the music playing on your computer on any streaming service, as well as movies from DVDs or other digital content distribution services.
The application lets you record any sound coming from a streaming service without quality loss in the output file. This means you'll be able, for example, to record any song playing on Spotify or Grooveshark and then save the file on your hard disk in MP3, WMA, M4A or OGG format.
You can do something similar with videos, which you can save on your computer as long as you're streaming the video from a website. Again, the quality loss compared to the original is zero, and the option to select different recording profiles will allow you to easily change the format and output options.
Audials Tunebite Platinum is one of the best products from Audials. An authentic all-purpose program for everything related to saving multimedia files on your computer, which also puts all the necessary tools at your disposal to organize them once they are stored on your computer.