Most likely you're running into a Sample Rate issue.

What sample rate should I use?

• RMS Keyboards requires a fixed sample rate of 44.1 kHz. This must be set at the system and audio interface level before launching the software.

• Sinfonia supports 44.1 kHz, 48 kHz, or 96 kHz, and allows users to select the sample rate within the application. However, all connected audio devices must match the selected rate for proper performance.

Regardless of which software you’re using, it’s essential that all devices in your audio chain—your computer, audio interface, and system settings—are configured to use the same sample rate. If anything is mismatched, you may experience clicks, distortion, dropouts, or complete audio failure.