This is already possible in 4.3.1 which is available on WiFi
How to set up a song with MIDI Song Select on the Aeros
First, the user must open the song, and edit the song settings (click the pencil icon in the Loop Studio)…
There are two relevant settings, MIDI Song Select and the MSB+PC setup. First, you must enable MIDI Song Select. Once enabled, the user can set which MSB (0-127) bank and which PC command will be required to open the song.
By using a MIDI controller capable of sending CC:0 (remember, this represents the general MIDI MSB bank) + PC commands in a sequence, you can open that song at any time.
How to open a song with MIDI Song Select
Step 1: Set a song to respond to a specific set of MSB and PC commands. Read how to do this above. Remember, MSB is represented by the CC command CC:0, the value decides which MSB bank is activated. For example, CC:0 value 4 is MSB 4.
Step 2: Set your MIDI controller to send a CC:0 (MSB) command set with a value between 0-127. In some devices MSB commands are sent differently, refer to your MIDI controller’s manual for more information on sending MSB commands.
Step 3: Next, set your MIDI controller to also send a PC command with a value between 0-127. This should be sent after the MSB command, if sent before it will not work.
Step 4: Send both the MSB and PC commands (in that order) to a MIDI channel the Aeros is currently listening to. Make sure the Aeros song you are tying to open is set to the same MSB and PC values you are sending.
Step 5: Your song will open.
To learn more about beta version 5.0.0, please read the forum post on it and follow the instructions. However, there is currently a bug where song select is not working. This will be fixed soon.