Can't turn ADF audio off

Hello,
I have an aircraft that when I tune the ADF to a valid frequency, I hear the audio code repeating as if the ADF audio panel button was enabled. Cycling the Audio Panel ADF button doesn't fix it, the audio code is heard regardless of button position.
Any suggestions to make the audio panel actually control the ADF audio?
Thanks,
Tippy
I have an aircraft that when I tune the ADF to a valid frequency, I hear the audio code repeating as if the ADF audio panel button was enabled. Cycling the Audio Panel ADF button doesn't fix it, the audio code is heard regardless of button position.
Any suggestions to make the audio panel actually control the ADF audio?
Thanks,
Tippy