Yep, I've got a feeling that the left side was not connected... But whether you used the MONO out or have only the one side recorded, I'm not 100% sure (sounds like the MONO out to me!).

Not that that makes it a lesser performance! Great stuff!

My take on the sound would be to roll off just a bit of lows... Do you have the EQ engaged?
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An arranger is just a tool. What matters is what you build with it..!