I have Magix MP3 Maker 12 Deluxe and need to adjust the BPM in a selection. Once I adjust the BPM how do I then save the selection with the changed BPM?
If you are using the MP3 Maker "DJ" tool then you have to record it again as a new file. I think that was meant for live playback, not alerting ...
Now, if you just want to change BPM of songs, use the Music Editor portion of the software. To do that, open MP3 Maker, then highlight the song you want to affect and press Edit Music at the top. That opens Music Editor. In there you can use the effects menu and look for Resample/Time Stretch, that is where you can select a new BPM for that audio then you can save it to where ever you like.