Hey there!
I am from the SS team and will be glad to contribute here.
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Yes, the BeatBuddy sends the start message to the Aeros. You can set the Aeros—in it’s global main menu settings—to respond to the MIDI Start command either by recording and playing back, recording only, or playing back only. You can also set each song to count in up to 3 measures before the Aeros starts recording after receiving Start command.
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It doesn’t automatically set loop lengths yet, but, you can make a loop any length you’d like. If using the current beta (which will be live for WiFi download directly to the Aeros very soon) you can set it to synchronize the lengths of tracks based on the current longest track in a song part. The length rules always allow for a 1 measure loop. The Aeros responds to messages best when they are sent before the next measure.
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Yep BB sends transition messages to the Aeros, in 2x2 mode (2 tracks in each of 2 song parts) the transition happens automatically to the next song part. In 6x6 (6 tracks in each of 6 song parts) you must first select the part you want to switch to, then enact the transition on the BB.
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It depends where the pre-recorded tracks are, if they are from an external playback device, like a phone or mp3 player, then they could be routed into the Aux in and you can set the Aux in to only route to the Aeros’s Aux Out. If you mean internally recorded tracks, the Aeros can’t route individual tracks to different outputs yet. All loop-playback will have to be routed to one or both outputs. You can, however, split the main thru signal and the loop playback to have the loops playback from a different output from the live main input signal.
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It is a reliable machine, the BB and Aeros were made for one another
