AN Niobium versus Tantalum resistors?

I will try a Niobioum on the input position for 500 hrs

I replaced the VC on my preamp with two AN Silver Tantalum resistors, turning it into a buffer.  The AN silver tants are huge in size and while maybe not exactly neutral they sure are musically enjoyable, IMO.  I have an outboard passive VC with Takman metal film shunt resistors and Vishay z-foil series resistors and it is comparably a little hard (but neutral) sounding compared to my other outboard VC that uses Amtrans AMRG Carbon Film Resistors, which I find to be a good combination of musical and detailed.  I doubt I would gain anything by replacing the AN silver tants with AN Niobium, but it would be easy to do.

It is Interesting how incredibly subtle aspects of complex field expression (current and voltage), as combined with molecular noise, all time shifted in some manner, as a slur or as a displacement in time and level of transient edges (the only part that matters to the ear--it is all we hear!) (that takes on aspects of a hysteresis curve, in written graphic expression) can combine to alter our understanding of an audio signal reproduction.

Where, knock on wood, the haters have yet to arrive. To speak, and share, without receiving undue abuse.

Sure is nice we have so many boutique parts available to us these days. My present recipe has combo of Takman Rey, Rex and Z foils in various equipment. AN Niobium more resolving than Z foils, that's really saying something!

@teo_audio I've come to liken it to comparing high-end glass for lenses. Zeiss, Leica, or a simple prism from grade school show you what happens when turbulence and time shift occur with light - prismatic effects, halo, chromatic aberrations. Electricity moving through materials (as wave or particle) subject to the same issues. Hence why we call it "colorations" to sound. My $0.02.