This toolbox function performs the same task as the
KlattSpectrumResynthesis toolbox function, but in the context of a spectrogram. The value at the left cursor positions is used for a stationary resynthesis of a vowel. The formant frequencies F1-F6, the fundamental frequency F0 and the RMS value for the frame where the cursor is positioned are used for vowel resynthesis.
During synthesis, an user interface is displayed that allows the user to modify the
Gain0 synthesis parameter (for amplitude adjustment) and to stop the synthesis.