That will help our recognizer handle the whistles no matter what frequency they start at. Next let’s work on the time warping. >> Just to be clear you’re talking about the problem where I could draw out your name saying Fad or say your name quickly like Fad. >> Yep, that’s precisely the problem we have. But with dolphin whistles, the problem is easy to see in the spectrogram. Basically we need to match the features that make the whistle distinct no matter if they are drawn out or produced quickly.