Sound bug

I had 120 noteblocks with stone under it. Thea are all activating at the same time combined with a short clock. After a short time the sound changes and gets louder and louder, also the other sounds like the sounds of animals. At the sound settings is nothing changed. If i change some soundsettings the bug ends, but comes back a short time after. At lower Soundsettings it seems not that worse than with higher soundsettings