Pitch and rate higher compared to the command line version of eSpeak

[Jip-Hop]

The pitch and rate (speed) of the synthesized audio are different compared to the command line version of eSpeak I have installed. Also http://www.masswerk.at/mespeak/ with the same language, pitch and speed has a different sound than this library. On the latest Chrome Desktop the audio from this library is both faster and higher pitched. However, when I use this library in the iOS9 Safari browser, the pitch and speed is lower... strange. Why do you think that is? Do you notice difference with the command line eSpeak and http://www.masswerk.at/mespeak/ as well?