Ratefix will analyze and attempt to repair damage done to audio (. wav) files that have suffered a digital transfer between two devices running off different clocks.
Eg: A file output at 44. 1kHz from one device clocked into a following device at 48kHz. Ratefix is not a Sample Rate Convertor. It will remove extra samples that have been inserted into the data and re-write the Sample Rate information in the file header back to what it was supposed to have been.