TODAY I encouter a problem。my schematic is as follows。now the value of C20 and C24 is 0.1uf. and the resistor R218 and R216 is not populated.my platform is MCIMX6Q5EYM10AD。 I have two single end input AUDIO2_IN and AUDIO1_IN ,which connected to outer interface ,when i test i connect a line jack to AUDIO2_IN and AUDIO1_IN and gnd, and connected another jack to LINEOUT_L and LINEOUT_R and gnd.then the program make a loop between audio2_in and lineout , i play a music into the audio_1in and audio2_in,while i hear the music through a Jack connected to lineout。I find there SO MUCH noise ,what was wrong ,can somebody help me ?very worried