I have used this app for seven years to edit wave files for my band’s first two albums and for radio station sweepers. Both albums received extensive FM radio airplay and one song went to #1. This app does many thing the very expensive pro audio programs do and in less time. Granted you need to know what you are doing to use this app to its full advantage. I highly recommend this app for people who want a simple program that can do almost everything Pro Tools does. I haven’t experienced the problems people have posted here. As with all apps you must learn how they work and not depend on knowledge of other programs to work the same as this one. If you want to the to use the space bar to stop and start the music it works. If you want it to stop at the spot you are at, press stop instead… The space bar will bring you back to where you originally started the song file. You can speed up and slow down with the app, but don’t need to. Just move the cursor bar to the time you want to start play and it will play from there. Simple!