Spotter 0 Posted May 2, 2015 Hi, I had already posted this but it disappeared so not sure if it was removed but nobody told me if they did ?? Anyway, I'll keep it short. i have a mini 2 channel DVR connected to a mini bullet camera running in my car to try and catch a vandal. i have connected a microphone also but my problem is the same with or without it connected. When i play back the video clips from the SD card on my pc, either by connecting a usb cable direct to the DVR or by removing the SD card and placing in a card reader, there is a horrendous screeching / whistling / high pitch warbling while the clip is playing . This wouldnt be a problem if i didnt want to use the mic as well, but when i connect the mic, most of the sound is drowned out by the interference. Any ideas as to where i am going wrong. I have tried a new DVR, different camera, different power supplies and different cables. i have tried playing back via scart on my TV and the sound is still present although not as prominent. Any help would be much appreciated. Thanks Share this post Link to post Share on other sites
