"PSF-o-Cycle is a companion tool for PSFLab which lets you: patch game EXE files using compiled C code, rather than hand assembly; mass-optimize a list of PSF files without having to babysit each one; automatically set the Length and Fade tags using the optimizer; recompress using the new 7-Zip Deflate algorithm (a 2 to 10% improvement); and upgrade the driver code in a list of PSFs, while leaving the song data intact."