Depends on the specifications of your PC, The Piapro Studio may be disturbed by noises and breaks up. In this case, test the method below.

・Adjust the buffer size of your audio devices larger.

*For the method of the adjustment, check this out.

・Play the whole track of the Piapro Studio for two or three times to earn phonemic data cache and play it again.

・Check this for another approaches for the unstable operations.