Homework 1 for MUSIC 220a


The concept of this sound sample is to give breath to a shooting star which may pass one by. The volume (amplitude) of the star's waveform increases as the star approaches, and then decreases as it moves off. The average frequency (pitch) of the star's waveform continually increases due to an imagined Doppler Effect causing the perceived frequency of the star to increase as it shoots by, in the same way as an ambulance siren would.
Three time series data sets were manipulated to represent components (asteroids?) of the star. The frequency of any data point (voice) at a given time was mapped by normalizing the y value of the data, multiplying by a chosen variation factor and adding a minimum offset. Then a Doppler Effect factor was taken into account, resulting in the final frequency which plays. The amplitude of each data set across time was mapped linearly to rise and then fall as the star moves across.


download Shooting star.wav

Source Files

download DataReader.ck download Player v2.ck Average monthly temperatures across the world (1701-2011) - Bellinghausen, Scott Base and Amundsen-Scott South Pole Station data sets.

U.K. Met Office data sets