For better sound quality, it is recommended that you adjust the microphone sensitivity manually. The automatic microphone control often makes a piano sound louder and a forte softer than actually played. This results in unwanted "dynamic jumps".
Unfortunately, pre-installed mobile phone apps usually do not allow manual microphone control.
However, there are photo and video apps that offer this option - e.g. filmic pro
This app is available for Android and IOS.
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