Nintendo soundtracks 8 bit???

Art1820m
Hi all , I was wondering the audio quality frequency response (small renged sounds)  for these old tracks was it 8 bit then? if so How can I achieve this small ranged sounds without the use of highpass filter or plugins that use sounds from that time with todays technology. I wanna be able to make any sound "sound: smaller in range frequency wise. Im very curious.
 
here is an Example: https://www.youtube.com/watch?v=HfbJK5m6wzM
 
 
FIRST Track is a good example of small sounds,. you dont hear  any muffled low-end.
 

Well you could use a bitcrusher plugin to simulate an 8-bit sound. But if you're looking to reproduce the sound of old video games then you'd have to look into the methods of synthesis those machines used, i.e. very simple oscillators - sawtooth, triangle, noise and lots of square waves with pulse width modulation. Very simple filters (low pass, high pass, band pass), ring modulation and simple ADSR envelopes. They squeezed everything out of these basic elements. There are probably a ton of VST synths out there which simulate the old 8-bit synth chips - I used to have a SID chip emulator which was pretty good. Also look into the whole Chiptune movement because those guys specialize in this kind of music. This forum looks pretty good: http://chipmusic.org/