I would encourage you to direct any industry insiders to the Roland-arranger.com site's 'Suggest new features' forum if they are thinking seriously about the CS, Ian...

I don't have time or room to list them here, but I wrote a couple of articles about ways that the CS could be made even BETTER than Roland's original implementation, and if they are starting from scratch, might as well try to incorporate a few...

God, what I'd give for a 76 PSR with a Chord Sequencer! wink
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An arranger is just a tool. What matters is what you build with it..!