Just spoke with Apple Support, they gave me a cure for Choppy Bluetooth Audio interference. I have a Bowers and Wilkins T7 and this worked for me.

So power down your iMac

Unplug all your connected items from the back of your iMac. Then unplug power cord from back of your iMac and wait 20 seconds. Plug in all your items back your iMac usb,s etc and then the power plug.

Then hold down the P & R & Alt & Cmd buttons ( Little finger on the P, forefinger on the R and thumb on both the Alt/Cmd buttons). Then press the power on keep holding down all the buttons till you hear the startup sound 3 times, then release the buttons. Wait till everything powers back up and hopefully that is your problem solved. I hope this helps

Just spoke with Apple Support, they gave me a cure for Choppy Bluetooth Audio interference. I have a Bowers and Wilkins T7 and this worked for me.

1. Power down your iMac.
2. Unplug all connected items from the iMac.
3. Unplug the power cord from the back of the iMac and wait 20 seconds.
4. Replug all items to the iMac (USBs, etc.), and then the power plug.
5. Hold down the ⌘⌥PR keys.
6. Power up your iMac, and continue holding down the keys.
7. When you hear the startup chime 3 times, release the buttons.

Wait till everything powers back up, and hopefully that is your problem solved.

I hope this helps.