The bolded answer Jason gave is the simplest and most direct method. In Sound Forge, you would right-click on the sampling rate displayed in the bottom right-hand corner and select "48,000" (this will in-effect speed up the playback to the correct pitch). Then choose Process / Resample / Resample and set the following: This process will resample the file to 44.1 kHz without adjusting pitch. Voila!!