Hey there,
Interesting request, yes, as of version 4.1.6, the BeatBuddy will switch to a song part without starting it when receiving the first half of the transition command (don’t send the CC:113 value 0 command, as this will start from it stopped), this will select the part without starting it.
So to select part 4, you’d send CC:113 value 4 while the BeatBuddy is in a stopped state.
Let me know if this is helpful!