Keywords: DG40S, DG40SA, dongle, not working, iTunes, no sound
If you have sound with other programs, while no sound with iTunes. It’s because you have to allow Bluetooth playback in the iTunes preferences. Please follow up below steps:
1) Open iTunes and click the little black and white square icon in the upper left corner.
2) Click "Preferences" and click on the "Playback" tab at the top of the pop-up window.
3) Near the bottom of the window you'll see "Play Audio Using:", open the dropdown menu next to it and select "Direct Sound."
4) Click "OK" and close the pop-up window.
5) Restart iTunes.