Whether it's a commercial, narration or character demo, I take pride in ensuring that every clip on a demo gives the talent the best chance to book a gig. My goal as a demo producer is to make sure every clip on the demo sounds like a real commercial or video game character!
The production part of putting together a marketable demo is quite the rush. First, I have to decide which take of the script is the best possible performance. At times, there could be a dozen takes on the file. Second, I usually have to remove some mouth noise and breaths from the reads. I like putting different effects on the voice if this is a character demo. If this is a kid in a haunted house, I like using a little reverb on the vocal. Not TOO much. We still need to understand what the character is saying or yelling.