Here's the problem:
When I plug in a ten-dollar pair of headphones into my Lenovo laptop (memory: 8GB), everything sounds great. Seriously.
When I connected my laptop to my Samsung SmartTV via an HDMI cable, I was very disappointed by the sound. So I bought a pair of Samson speakers that look like this:
I connected them to my laptop with a USB-RCA cable.
My opera recordings sounded just as bad on them. The high and low registers were all mangled, and when I turned up the volume, the music sounded both flat and distorted.
I added an interface that looks like this:
It didn't help.
What am I missing? How can I fix this?