As for me, the Nintendo has a wonderful system sound. Frankly speaking, I have met with the problem - I couldn't connect the audio to my TV, but thanks god, that I found the guide:
From the Wii U Menu, select "System Settings."
Using the Left Stick, scroll to the "TV" icon and press the A Button.
Tap "TV Audio-Output Type."
Select an audio-output type for the TV.
Tap "Sample" to preview the sound-output from your TV.
If "Surround" is selected and you have installed the latest system update, you will need to select "Audio Test" and "Yes, I can hear them" when you hear the sample.
If you do not hear the sample, select "No, I can't hear them" and read the on-screen information.
Tap "OK."
I can play my favorite retro games. I
download the n64 roms, which can be played with their mainthems, which bring me back to childhood.