Because of the Thanksgiving holiday in the U.S., TI E2E™ design support forum responses may be delayed from November 25 through December 2. Thank you for your patience.
Gerry,
This is a known issue with the LM4667. The LM4667 is a second order sigma-delta class D, which has output tones when no input is present. The tone frequency and amplitude vaires from part to part, you may have one device with tones in the audio…
