This problem may be dependent on the performance of your computer.
However, you may be able to fix it by checking and, if necessary, revising the audio buffer setting.
From the "Settings" menu, select "Preferences", and then click the "Audio Settings" tab. At the bottom-right corner of the "Synthesis Engine" section, set the "Buffer Size" value to a value larger than the current setting.
If you are unable to find a solution in the Troubleshooting section, please use the Inquiry Form to submit an inquiry.