"I didn't record any additional dialogue for this CD, they are excerpts pulled from existing episodes"

This quote by Tara Strong suggests that the CD she is describing is a compilation of audio clips from existing episodes. It indicates that she did not record any brand-new dialogue specifically for the CD, however instead utilized existing dialogue from episodes she had already been a part of. This might suggest that the CD is a collection of her finest lines from the episodes, or it might be a collection of her most memorable minutes. It could also be a collection of her most renowned lines from the episodes. Whatever the case, it is clear that the CD does not include any brand-new dialogue from Tara Strong, however instead is a collection of existing discussion from episodes she has actually currently been a part of.