Sound Forge Audio Cleaning Lab 3 - 64 bit (new download 6/8/21), Windows 10 Pro 64 bit, HP Z420 workstation, E1660-0 processor, 64gb RAM. Trying to fade songs out using the fade handles & curve selector but when the songs get saved, the fades are not there. In fact, the dead air has increased. Importing .m4a files, trying to fade & adding some mastering, exporting as .mp3 VBR files.