Audio htc m7 mic distortion

Hello, i think i have a m7 with the new mics, with no free distortion, example in metal concerts,i try a lot of things, i discover that with the application cinema fv-5 and only with a pair of headphones, i set the audio recording to external mic, using the headphones as microphone, or maybe with only the jack connection, the distortion goes out compared with internal mics of the phone, in a high loud enviroment, i use viperone 5.8 and elemental x 14.1, I leave this to the public knowledge, regards \m/,