@SoundSquareMost modern trackers like Renoise have this function which is a must have. If you can implement this, i'd certainly use Digibooster for advanced projects.
After I've thought a bit on it, there is one question to answer. In DB3 engine the audio track is monophonic, until it gets into panorama processing block (which has mono input and stereo output), and then echo block (which is stereo->stereo). When writing multichannel output, DB3 may either:
1. Output mono tracks, before they get into panorama unit. It assumes that applying panning and echo belongs to postprocessing and will be done in the postprocessing application.
2. Output stereo tracks with panning and echo applied, like L1, R1, L2, R2 and so on.
What is better? Implementation of either variant is not difficult.