My £0.02 worth,
Just some stuff to think about.
Historically,
Its been proven time and time again that flat-earthers saying current theory is the be all and end all and theres no point thinking otherwise have been proven wrong in time?
In this case, (and speaking from subjective experience and experimentation over many years) its self limiting behaviour IMO to say it all stops at 20k...and even 44.1K.
A question to think about?
Can the human brain be affected by frequencies higher than 20K?
Not Can you 'hear' it...but is it affected by it?
Is there definative research to prove its not?
And given that listening to music is a wholly Subjective experience (cos it is), will our musical enjoyment be affected?
As to the advantage of 'higher than Nyquist' frequencies....one word:
* Harmonics.
My ears, my experience 16/44.1 can be bettered but anything higher than 24/96 is just wasted 0's.
AC POWER
Hardwired 10kVA balanced mains powering entire system
AMPS
Meridian 557 power Amp (Modded) / PS Audio BHK Preamp (Modded)
SPEAKERS
Wharfedale Evo 4.4
DAC
PS Audio Directstream (Modded)
TURNTABLE
Pro-Ject X8 balanced output via XLR / Ortofon Quintet Blue cartridge
PHONOSTAGE
Pro-Ject DS3 B balanced Input (TT and Phonostage powered by Pro-Ject Power box RS2 linear psu)
DIGITAL
OPPO 203 (Modded: Linear PSU, i2s output to Dac) - Roon Endpoint, HDMI input used for all things Streaming/ PS5 /AppleTV ... also good for movies apparently?
MUSIC PLAYBACK
Tweaked AP-Linux based Roon Server into Oppo 203 as Roon endpoint
Ipad Roon Remote.
Apple Music/ YouTube via AppleTV, fed to Dac via Oppo HDMI input/i2s output to Dac.
SPEAKER CABLES
Biwired: Duelund DCA10GA (Bass) Duelund DCA16GA (mid & treble) Duelund 12DCA used as jumpers (On "Blackcat Cable" Chris Sommivigo's advice - yup, even with biwire it sounds better - and it does)
INTERCONNECTS
All Balanced: Ghost+ recording studio XLR cables