|
His sentence was analyzed by a computer according to following steps:
- Total duration of sampled sentence is 5.4 seconds
- The sample was subject to a McAulay-Quatieri type of Fourier analysis (FFT; Fast Fourier Transform).
- A FFT frame size of 10 msec yielded 540 continuous spectra with 100-200 partials. Their temporal succession was expanded by a factor of 1000 to Der Sprung’s total duration of 90 minutes.
- Of the over 200 spectral components, only the 24 strongest were retained and used as pitch material.
- After time stretching, each frame’s duration is 10 seconds. Thus, the succession of the 540 frames, i.e. 540 chords, creates a precision clockwork determining the harmonic rhythm of the entire opera.
After analysis the sentenced was resynthesized with 16 partials and transposed down by approximately 150 cent.
Listen to a MIDI version of the sentence with time stretching (1000x) with 8 partials.
Caveat: The duration of this example is 90 minutes long; the duration of the entire opera
|