[App_rpt-users] USB sound FOB lack of high frequency noise

I just put together a modified sound fob by taking a 10µF capacitor to the divider of 47k and 68k resistors and then to the microphone input of the sound fob, but I am getting the lack of high frequency noise error when I plug my fob into the radio. A DMK URI works fine. Has anybody else had problems with these sound fobs? 73 kd0whb