The ch and the j can sound very similar, but I definitely DO NOT hear an extra I between the ch and the y.
There's no jay in the sentence. I've been listening to it over and over trying to hear something different. Are you expecting the correct sounds? The transition from 'ach to yIn should sound just like catch yin in English. Yin as in yin and yang. As this is a very early lesson, I've re-recorded it with a longer pause between 'ach and yIn but as the lessons get more advanced we're trying to record at a more natural speaking rate.
Try to use your knowledge of how the language works guide you in writing down what you hear.