The orchestral A, to which orchestra members tune their instruments, is 440Hz, s

Question

The orchestral A, to which orchestra members tune their instruments, is 440Hz, see http://en.wikipedia.org/wiki/Concert_pitch. The conversion from notes to pitches can be seen here http://en.wikipedia.org/wiki/Piano_key_frequencies. The notes to "Twinkle, Twinkle, Little Star (origin France, but arranged subsequently by Mozart) can be found here https://answers.yahoo.com/question/index?qid=20100115093449AAyTDR5. Write a program that generates the time domain signal that is Twinkle, Twinkle, Little Star. With this information. Notice that the time for which a note sounds is the same for most but not all notes. If this is unfamiliar to you, try the forum, probably a classmate will tell you. It is ok if you make the longer duration notes twice as long as the ordinary notes.

Suppose you wished to construct a "round" (see http://en.wikipedia.org/wiki/Round_%28music%29). Starting with your time domain signal for twinkle, twinkle, what mathematical operations would you make on it, to produce a three part round with it? Write this in code.

At any given time instant in your round, there will be tones active. Use a frequency domain representation to show these tones. Update your figure window to show the succession of active tones throughout the duration of the round. If you generate high frequency artifacts during the switch from one note to the next, use a window.

Explanation / Answer

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