istephenyu8790-san, videovillain-san,
thank you very much for the interesting info and your efforts!
I just want to point out that Google translate is NOT ideal at all for this much detailed observation.
I checked the sound of とうちゃく on Google translate now and it doesn't pronounce it properly NOR with correct
pitch accent. For me, it sounds like a Korean person pronouncing it (i.e. pronunciation with certain Korean accent).
In the word とうちゃく, because of the く sound coming soon after ちゃ, this tend to be pronounced without vowel and just
"ch" in natural Japanese. Of course, with less movement of mouth, it can be heard very differently as well.
Natsuko(奈津子),
Team JapanesePod101.com