My first day with my beatbuddy and here is something I found:
Set Headphone dial to Off or to 0%. While playing any pattern, press the tempo button then press the back navigation button, the screen says “Headphone Vol: 0%” and then returns to the now playing pattern. This does not happen when the Headphone vol is set to some value other than 0.
You may have to wait for the pattern to start from the beginning so wait a bit.