Dear Yamaha Support Team,

I am writing to report an issue with my Yamaha CP88 stage piano. The sound output is noticeably weak in volume and sounds thin, regardless of the preset or settings used.

I have thoroughly checked all cables and connections, and they appear to be in good condition. Based on this, I believe the issue may stem from either the internal electronics or software.

I would greatly appreciate your guidance on how to proceed with troubleshooting or arranging a repair.

Thank you for your time and support.

Best regards,