Please mind that currently the Aeros does not automatically add any samples to the end of an imported file, so it will effectively trim the end of the backing track and use the last 360 samples to create the crossfade. You must add these samples manually for externally imported files, some methods for removing them are explained in the General Tech section of the Aeros Manual. This would be a similar but opposite process of adding space at the end of files when exporting from your DAW.
If you record the track in the Aeros however, this will give you the added benefit of already having the samples needed to bring the loop back in seamlessly once in the Aeros.
We understand this is not ideal however and hope to expand upon the importing and also the exporting capacities of the Aeros to minimize issues like this and make it incredibly seamless and straightforward without tips and tricks to get it working very smoothly across parts.
If you do not need the parts to change seamlessly into one another and just have one backing track of a whole song in a part, this will work fine.