The i Tunes Store is also available on the i Phone, i Pad, and i Pod Touch.
Through the i Tunes Store, users can purchase and download music, music videos, television shows, audiobooks, podcasts, movies, and movie rentals in some countries, and ringtones, available on the i Phone and i Pod Touch (fourth generation onward).
After a playlist has been created, you can listen to it, put it on a CD, move it to an i OS device, share it over a network, and so on.
NOTE Playlists are the most useful for music, which is the focus of this chapter.
Here are a couple ways to fix this issue that we have gathered: Never delete Genius Scan in that case. If none of these solutions work, we recommend contacting the App Store support.
Again, beware deleting Genius Scan and reinstalling it isn't a good solution especially if you have important documents stored in it.
To uncover part of how i Tunes Genius works, says Goldman, “look at information retrieval algorithms, especially those that leverage the vector-space model.” But before you can compare factors, such as the frequency of a particular artist or genre in a user’s library or playlists, across i Tunes libraries via a Vector-Space model, you need a clever way to define the factor that gives more weight to the things that really matter.
A simple way to properly weight factors for comparison is what’s known as term frequency-inverse document frequency (tf-idf).
is a media player, media library, online radio broadcaster, and mobile device management application developed by Apple Inc.
It is used to play, download, and organize digital downloads of music and video (as well as other types of media available on the i Tunes Store) on personal computers running the mac OS and Microsoft Windows operating systems.
Recapitulating what Steve Jobs has said previously about i Tunes Genius, Apple engineer Erik Goldman writes in his post on Quora that the starting point for the Genius service is a packet of usage data–what songs a user has in his or her library (and, presumably, how often he or she plays them)–sent from the i Tunes application which is “folded into a larger database of users and songs.” Basically, your library of tracks is compared to all the other Genius users’ libraries of tracks.
Apple then runs a set of previously secret algorithms, which Goldman described as straightforward recommendation algorithms similar to those used by other services like Netflix when it suggests movies for a user to watch now or add to his quene, to generate statistics for each song.
However, playlists are equally applicable to other kinds of content, such as videos and podcasts.