How does NES upgraded audio circuit sound?

[Brad251]

On an NES RGB mod, Voultar gives the option to have an upgraded audio circuit installed. What does the upgraded audio circuit do and how does it sound? I like the way NES games sound in Nestopia; would the upgraded audio circuit produce sound that is similar?

[KonradKlaus]

I cannot comment on how similar it is to other things, but I can say it is not noisy like the standard nes audio, and it sounds really great. I am happy I got it.

[unmaker]

It's an improvement over the stock audio. There's less interference, better treble, and the external audio is more balanced.

[leonk]

This "upgraded audio circuit" .. it doesn't sounds the same as "Fake stereo". Is he referring the the audio amp that's found on the NESRGB? If so, then most NESRGB installs do this.

[mvsfan]

play the game sky shark if you want to hear how great the Nesrgb audio sounds. Its definately an improvement over stock.