Mally, what you are stating is way to vague for me to be of any help. The reason I say this is because I have no idea what procedure you are using to do these things. If you could give a step by step idea of what you are doing in the saving end and then a step by step account of the performance end I might be able to get some kind of a clue. There are some on this forum that have experienced this volume change when they use an expression or swell pedal hooked to their board. There are many who never have run into this volume change thing including myself. I have tried to reproduce this on my board but never have been able to with the procedure I use in my saving and playing. Even with the expression pedal in use. I have received a couple of disks from others that I did have problems with. However I have been able to pinpoint what they did that caused the problem. You might get in touch with Walt Meyer for he has been having this happen to him for quite some time. If you or Walt would send me a disk of the setup of your board as it is when this happens, I might be able to be of some help. It is my personal opinion however that this mystery lies in the area of the way a person understands and performs these operations on his keyboard rather than a malfunction of the equipment. With that said, I have been all wet in my thinking before. If you don’t believe it, just ask Ruthie. So Mally, if you would be inclined to zip me over a disk of your keyboard setup when this happens it would be a pleasure for me to see if I can help you in any way. Nothing ventured, nothing gained as the old saying goes.

Grandpa Doug

P.S. Please let me know if you use an expression pedal and how you save things.
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Grampa Doug