[SOLVED] is there a Audacity plugin that enhances the quality of slowed / sped up tracks

So, basically audacity has this thing where when you slow/speed something up. The quality will become (to my ears) noticeably worse. So, I was wondering if there was a plugin that'd make the quality for that better.
Or maybe another free audio editing program, that you can slow / speed up tracks with better quality than Audacity.