I ___ wanted-- I have dreamed of becoming a musician.

I um wanted-- I have dreamed of becoming a musician.

The above sentence is a false start and an example of a full verbatim error.

Explanation:

A full verbatim error is a type of reporting in transcription where the reporter records everything that was said by the speaker including all the mistakes that he made.  

In the sentence above, the speaker uses a false start after which he changes his mind to what he actually wanted to say. The recorder still reported the speech that way without editing the false start.

answer; taking detailed notes during the interview;