Although it was far better to ask Mr. Tufeld to record some custom lines for you, the B9 Club developed a piece of software that uses clips that are strung together by the computer into sentences and allow a pretty good interactive experience with the Robot, with someone sitting behind the scenes running the computer.
He did have throat cancer a few years ago, he recovered but there was damage and he said they had to "freeze" one of his vocal cords. He could still do the Robot and VERY VERY kindly still was doing phrases for the club. But he did retire from voice work. Also the Robot "voice" was processed a little bit. So the raw voice wasn't quite what you were used to.
He was a great and kind man, I met him a few times through all the Robot stuff I did.
Although Bob May certainly did the heavy lifting (literally) in the Robot suit. The voice brought him to life for me.
Sad new indeed. Mr Tufeld was kind enough to do a few custom voices for me through the B9 club, and they will be treasured. Condolences to his family and friends, and my heartfelt thanks for making the original B9 my childhood hero.