Can you tell me what a low pass filter is please?
high cut! cut the high. leave the low. you're hearing just the low. like you are in a car with the windows closed and someone is playing music outside the car. or you are in an under water swimming tank, and someone is playing music outside the tank. or you are outside the tank and someone is playing music in the tank. i think you can imagine what this sounds like. or you have pillows over your ears. etc.