This app looks at all of a twitter user's tweets from the last week (limited to the most recent 100) and generates a short musical composition based on them. A live version of the app is available here.
On the front page, simply type in the twitter hand you would like to hear and press enter. A page with a list of the user's most reent tweets will load, and the song generated from their tweets will play.
The song is generated from a number of variables.
First, the tempo comes from the number of tweets the user has made in the last week, using ((nuber_of_tweets) / 100) * (180 - 120) + 120 to keep the tempo within the range of 120 to 180 beats per minute.
Second, each tweet from the last week creates a note, and the notes are played in order.
The following function generates note lenghts based on tweet lenghts:
gatherNoteLengths: function (lenghtsArray) {
var notesArray = [];
lenghtsArray.forEach(function (length) {
if (length >= 120) {
notesArray.push('4n');
} else if (120 > length && length >= 90) {
notesArray.push('8n');
} else if (90 > length && length >= 60) {
notesArray.push('16n');
} else if (60 > length && length >= 30) {
notesArray.push('32n');
} else if (length >= 0) {
notesArray.push('64n');
}
});
return notesArray;
}
A short tweet will produce a sixty-fourth note, while a long tweet will produce a quarter note.
Later, the note tones are generated based on each tweet's unique tweet id.