I started from https://github.com/m5stack/esp-adf.git
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Latest posts made by funghy
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RE: Mod to programmatically disable speaker whine/hiss.
It is probably better not to connect PIN 1 of the NS4148 but pin 3 the buck converter EA3036 to pin 5 since otherwise you have a bigger power consumption. You could also remove R23 in that case.