infact I made simultaneously but in 2 separate tracks 2 different recordings : 1 IEM and 1 audience . When I listen to 1 of the saved file ( but infact both files give me the same result ) I have long interferences : then 1 second of iem, then the 1 same second of audience, then interferences again . total during time 1h24, what should be the real durung time of EACH recording ...