We see easily that a square wave will have ringing on the'link i posted comparing akm and ess filters .
I can easily guess that a squarish guitar distortion would suffer from this ringing. Then for this it seems obvious than nos filterless will render it better. Filterless means no digital and no analof filter.
I'm the only one here that try to understand why some prefee multibit. If you don't want to find why then ok i don't try to have ideas.
It depends upon the rise and fall times of the edges of the square wave. It is easy to generate edges that exceed the frequency passband of the filters, or the frequency content of musical instruments or audibility for that matter. But virtually every recording and playback chain includes ultrasonic filters so again such high frequencies would not be present in the recording. And I am not sure what you mean by "render it better" -- the postulated square wave, the ringing? A NOS filterless DAC cannot reproduce reproduce signals above one-half the sampling frequency without aliasing; nor can any DAC. Look up Nyquist Sampling Theorem (Or Nyquist-Shannon Criteria). So any high-frequency content above 22.05 kHz (assuming standard 44.2 kS/S converters) will be "folded" or "reflected" around the Nyquist rate (one-half the sampling rate) and re-appear as new signals (not in general harmonically related to the original signals) at lower frequencies in the ADC (recording side). At the output, images appear, again related to the clock frequency and signal frequency, so again you get new frequencies not in the original source. That is a a significant source of distortion if you eliminate the anit-image filters.
In the real world there is always a filter present somewhere; no real system has infinite bandwidth. It may happen in your preamp or AVR after the DAC, the power amplifiers, the speakers, or your ears.
You are now introducing "filterless" NOS which means there will be images present that are not there in the original recording. That presents the system with high-frequency energy not present in the original source and well beyond the abilities for most speakers to reproduce properly (if at all) let alone our ability to hear them. You are in essence choosing your distortion.
You are arguing multibit is better but not providing any technical basis for that assertion and your posts prove a deep lack of understanding of , and in many cases misunderstanding of, basic sampling theory and signal processing analog or digital. And then refusing to take a look at some of threads here and elsewhere that would help you learn. Your goal mainly seems to be to prove you are right and waste all of our time endlessly trying to explain first principles that you choose to ignore. You would not have to guess if you would pursue some of the resources offered to you.
IME/IMO, like tube amplifiers, the most likely answer (look up Occam's Razor) for preferring multibit is that people like the added distortion. Multibit converters tend to have higher noise floor and higher distortion that "fills in" signals and may make the music sound "richer" or "fuller". Consider a subwoofer; if you play a 40 Hz tone you probably do not really "hear" it as much as "feel" it. Add second and third harmonics, creating tones at 80 and 120 Hz, and all of a sudden the sub sounds louder and you hear it much more readily. You are hearing distortion but the sub may sound better to you because of that. Multibit converters do essentially the same thing, and by removing the anti-image filter after the DAC you can add additional modulation products (distortion) from other components, including the speakers, to appear in the audible band. Those distortion terms can change the sound and you might like it that way.
There is one caveat: noise modulation is a real thing that occurs to a greater extent with delta-sigma designs than conventional designs. By most measurements it is at such a low level that it is inaudible, but plenty of audiophiles disbelieve measurements and feel their ears are better. And plenty of marketeers prey on that assumption.