Puppyt, there are several ways to limit the duration of the output file, without the need for an external app like Audacity: - pressing [q] or [ctrl+c] on the keyboard to stop ffmpeg (it will correctly finish writting the output file) - specifying -t <seconds> in ffmpeg's options, like this: sbagen ...

nooby, yes, you neead headphones, because pulsing beats form in your brain, not in your ears, like with monaural beats. If you understand how BA beats work, it will be obvious why do you nead headphones: http://www.guide-to-self-help-techniques.com/images/Binaural_Beats_2009-2R.gif Both your ears ge...

Here is a free database of sbg files (for SBaGen) with audio preview: http://sbagendb.gusari.org/.