sf - Synthesize File
sf [-gain:[+-]<db>] <input.ksp> <input.wav> <output.wav>
sf reads a file containing synthesis parameters
(typically created by program gensyn)
plus a file containing excitation waveforms (typically created by
program synsrc) and writes a synthetic
speech waveform file. sf implements most of the code
described by Klatt (1980) for software synthesis, but does not contain
the source generation code from Klatt's synthesizer. Instead,
sf accepts precomputed excitation waveforms which are then
passed through the formant resonator sections of the Klatt synthesizer.
The voicing source generated within the Klatt (1980) synthesizer was
not as natural sounding as many more recent models.
Provides an overall amplitude adjustment to prevent
clipping in the generated waveform. The peak amplitude
value of the waveform is printed (in dB) on program
completion. If the peak value exceeds 0 dB, enter
a negative gain factor large enough to bring the peak
level to below 0 dB.