MilanDka I tried to reproduce your problem with H7 but on all my devices, the H7 played in your video registered perfectly. To further narrow down the problem, I would need a recording of the exact audio that your tuning device is picking up. So, the next time you are encountering this issue, please do a screen recording on your tuning device, because this will contain the exact audio signal. Here is a description on how to easily do screen recordings: https://support.apple.com/en-us/HT207935
Make sure that you activate the audio option for the screen recording, because by default screen recordings are done without audio. Thanks!