Pro 3 Service Program - Crackling Outputs 29 June 2023 12:00 Updated We have discovered a production issue affecting some Pro 3 and Pro 3 SE synthesizers which we manufactured in the first half of 2023. It can lead to crackling on the main audio outputs. The issue affects a very specific range of serial numbers, and customers with an affected synth should contact us to arrange servicing to resolve this problem. The affected range is: Pro 3 Keyboard: Serial numbers starting at 2635 up to 2684 Pro 3 SE Keyboards: Serial numbers starting at 1600 up to 1689 If you are the owner of one of these synths, please initiate the service process by raising a support ticket at: support.sequential.com Related articles Pro 3 & SE Troubleshooting A Brief Explanation on Calibration Backing Up User Sounds Over MIDI Prophet-5/10 Keyboard Troubleshooting Analog Synths and Expected Variations