feedback from iMac speaker when I plug in an iPad Pro

Hello William Heber Percy,

Thank you for reaching out to Apple Support Communities, and we'll be happy to help in any way we can. We understand you're having issues with the sound when using your iPad to Mac. Try the steps listed here to see if htey resolve the issue: Resolve Wi-Fi and Bluetooth issues caused by wireless interference - Apple Support

"Symptoms of wireless interference

Any of these symptoms could be caused by interference affecting the Wi-Fi or Bluetooth signal:

• Device doesn't connect or stay connected
• Connection is slow and signal strength  is low
• Bluetooth audio skips, stutters, cuts off, or has static or buzzing
• Pointer movement is erratic or jumpy

How to reduce wireless interference

These general steps can help achieve a cleaner, stronger wireless signal:

• Bring your Wi-Fi device closer to your Wi-Fi router. Bring the Bluetooth devices that are connecting to each other closer together. 
• Avoid using your wireless devices near common sources of interference, such as power cables, microwave ovens, fluorescent lights, wireless video cameras, and cordless phones.
• Reduce the number of active devices that use the same wireless frequency band. Both Bluetooth and Wi-Fi devices use the 2.4 GHz band, but many Wi-Fi devices can use the 5 GHz band instead. If your Wi-Fi router supports both bands, it might help to connect more of your Wi-Fi devices to the 5GHz band. Some dual-band routers manage this for you automatically.
• Configure your Wi-Fi router to use a different Wi-Fi channel, or have it scan for the channel with the least interference. Most routers perform this scan automatically on startup or when reset.

If you're using USB 3 or Thunderbolt 3 devices with your computer, you can limit their potential to interfere with nearby wireless devices:

• Use a high-quality, shielded USB or Thunderbolt 3 cable with each device.
• Move your USB 3 or Thunderbolt 3 devices—including any USB hubs—farther away from your wireless devices.
• Avoid placing USB 3 or Thunderbolt 3 devices on top of your Mac.
• Turn off any USB 3 devices that aren't in use.

Avoid physical obstructions in the path of your wireless signal. For example, a metal surface between your Bluetooth mouse and computer could cause the mouse to perform poorly, and a metal-reinforced concrete floor between your Wi-Fi router and Wi-Fi device could cause poor Wi-Fi performance.

• Low interference potential: wood, glass, and many synthetic materials
• Medium interference potential: water, bricks, marble
• High interference potential: plaster, concrete, bulletproof glass
• Very high interference potential: metal"

We hope this helps.

Cheers!

Thanks for that info William Heber Percy,

To further isolate the issue, we would like to test in safe mode and a test user.

Safe mode will rule out the possibility of interference from any third party app. Here is how to test: How to use safe mode on your Mac - Apple Support

A test user will tell us if this is system wide or specific to your user. To set ups. test user, here is a user guide: Change Users & Groups settings on Mac - Apple Support

Please test in each and report back your results.

Cheers!

William Heber Percy,

Let's continue with narrowing down why this is happening. If you test with a different thunderbolt cable, does the same buzzing noise occur?

Try connecting without using the hub. Is there any improvement with the noise?

Regards.

Hi, the problem is solved for me with the new iPadOs 16.2 released yesterday !!

No buzz anymore when sharing the screen in Zoom with cable. 🥳

Hi, the response I had from a user on the Zoom's forum. It works very well for me ! Save my live session ! 🙏🏼

Hope that could help.

You're welcome ☺️