TandemSTRAIGHT is a set of Matlab scripts for analysis and manipulation of speech, and you can read more about it on the TandemSTRAIGHT website. These are the results of some basic tests I’ve made for myself, using two different sounds and transplanting the different acoustic parameters in STRAIGHT from one to the other.

You can choose the base and target sounds from the drop-down menu (although so far there’s only two sound pairs) and select the features you want copied to see the spectrogram of the synthesised sound. If you click on the spectrogram, you can also hear how it sounds.