The manipulation dialog is accessed through the TandemSTRAIGHTHandler program, rather than the morphing menu. Near the bottom after analyzing a sound file or loading a pre-analyzed sound file, you can click the “Open manipulation GUI” to manipulate a given sound file.
When you load into the dialog, it shows you the spectrogram along with figures for intensity, F0, size ratio, duration ratio, and AP ratio.
From here you can use the pen tool to draw contours and patterns for something like F0 or intensity.
You can also use a rectangle selector (selected via the radio buttons on the right side of the interface. If you want to make the first word longer by some amount, you can select all the points and then raise their duration ratio.
To generate the synthesized wave file, press the “Synthesize” button to hear what the current manipulation sounds like. When you’re happy with the synthesis, press the “Save results” button to save a .mat file and a wav file. The save box makes it seems like only a .mat file will be saved, but a wav file with the same name will be saved in the same place.