Samsung ditched the 3.5mm jack along with the restriction of using third party accessories on its USB C Port and not every adapter works perfectly with it.
Check if your adapter has an in-built DAC losless adapter.
You need an adapter which includes a DAC(Digital-to-Analog Converter) circuit which simply converts a digital audio signal into an analog one so that your headphones can then create sound.
In my opinion, i think the adapter isn't compatible..try searching a for a recommended adapter on web maybe?
