Comment 1 for bug 1285450

According to the homepage librubberband should be able to do sample exact time stretching: http://breakfastquay.com/rubberband/why.html.

  "Rubber Band is designed to satisfy the need for a sanely licensed time-stretching library that sounds good enough for general musical use and also meets the many other requirements that make it useful in practical applications.... These include: Sample-exact time-stretching;"

It's right there on the webpage. I also read in their code that their algorithm is designed specifically for that. It might be worth checking all the parameters we are setting for it.