Hey there,
I split the topic since it was getting off-topic from the original
Basically, the BeatBuddy has a specific song select MIDI message that opens a song on it. By default, it listens to both MSB and LSB to choose a folder and PC to select a song within the folder. PC commands can be sent on their own to select a song within the currently open folder.
So, on the Aeros song, you would identify what MSB LSB and PC commands would be needed in order to open the specific beat/song inside a specific folder, say Rock 1 works best for your song.
You would scroll down to the MIDI Out Control song setting and enable it, then use the three settings MSB, LSB and PC (or any combination of the 3) to set those values. Hit save to save this preference to your Aeros song. Now, every time you open the song it will send these values and open the specified BB song
Read more about the Aeros and BeatBuddy in their manuals
Thanks for the question, let me know if this is helpful!