The Kyma Language for Sound Design, Version 4.5

The Tool performs an analysis that breaks down the sample into a time-varying filter (the resonator) and
an input to the filter (the excitation) that exactly recreates the sample. The description of the resonator is
placed into an RE file, and the excitation is placed into an EX file.
The RE file can be used to control an REResonators filter operating on an entirely different input in order
to perform cross synthesis. In this case, the REResonators will impose the formant (or filter characteristics)
of the analyzed sample onto its input.
To use the RE Analysis Tool, choose RE Analysis from the Tools menu.
Click on the Browse… button to choose from a file dialog the sample to be analyzed. Kyma will play the
sample that you selected.
The other parameters control the analysis. Try the default parameters first. Then you can try adjusting
them:
♦ Filter order is approximately twice the number of resonant peaks in the time-varying filter. The
larger this number, the larger the number of formants or harmonics that can be tracked, but the
longer it will take to complete the analysis.
♦ Filter updates per second controls the number of individual filters that are created each second. For
improved time resolution in the resynthesis, make this number larger.
♦ Averaging time controls how much of the sample at any one time should be used by the analyzer to
determine the filter. This number should be about twice the period of the input signal (in other
words, twice the duration of a typical cycle of the sample). If you know the fundamental frequency of
the sample, you can take the inverse of that and multiply by two to get an approximate averaging
time.
Click Create RE file only to create just the file containing the description of the time-varying filter, or
click Create RE and EX files to create both the filter description and the filter input files. In either case,
after the analysis has completed, an example Sound will be placed into an untitled Sound file window for
your use.
The resulting filter is extremely sensitive to overflow when not using the corresponding EX file as its input.
You should use an Attenuator to attenuate the REResonators Input (sometimes by as much as
0.001).
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