It sounded like TM put his dialogue recordings through a couple of different filters before plugging it into the video. I agree that there was too much echo and it almost sounds at times that you slowed the sound sample down to give it an even lower pitch. I don't know for sure, but that is what it sounded like to me. Of course, the best recording would always be to actually use a voice-actor that has a deep voice. Short of that, just trying your darndest to make your own voice deep is most times preferrable to using a filter to make it sound that way. Since it seems that most people agree it should be a bit higher in pitch anyway, I think that TM will find a way to achieve good results.