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Hi, welcome to Just Answer and thanks for your question!


This is a common problem and is related to the individual key contact for that one note. What happens is sometimes the digital signal is interrupted by dirt, debris or corrosion so the note plays as if it is pressed as hard as possible. You may be able to fix it yourself but you might have to seek professional help if these tricks don't work. Try playing the note many times in fast repetition to dislodge anything that might be stuck there. Also try spraying some canned air in between the keys and underneath it if you can get the nozzle in there. If these things don't work you'll likely need to just get the contact repaired and will need a tech to do that. I hope this helps and wish you the best!

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