On Yamaha there is a "Parameter Lock" page...does the BK-7M have it's equivalent but perhaps they call it something else?

Also there is a "Freeze" function (you probably know this since you had a PSR-3000), so there must be a similar function on the Roland, again, perhaps under a different name?

Ian
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.