Help! Each Track sound plays simultaneously when keyboard is played.

I am struggling with learning Cubase. I have no prior experience with DAWs. I am learning. I have put down three tracks to my first project. Suddenly, when I began to play my fourth track, when I play the keyboard ( Roland RD2000), all of the previous sounds assigned to the other tracks sound. I have rebooted, etc. I don’t think I have accidentally clicked on a forbidden icon. This hasn’t happened in the three days I have been working with this project. Help please.


Make sure, other MIDI/Instrument tracks have no Record enabled or Monitor enabled.

i’ve also run into this… only the most recent track has the REC button activated.


Where are your other tracks routed to? Aren’t they routed to your Roland? Doesn’t it work as MIDI Thru?