What you like to listen to at home is the gold standard. :)
The term High Fidelity was coined with the word "fidelity" meaning the sound of reproduced music was judged in relation to the sound of, at the time of the phrase’s coining, the live-performances that had been recorded. That was the standard that both J. Gordon Holt and Harry Pearson used in their evaluations of both recordings (Holt was a good recording engineer) and Hi-Fi gear.
But that 1st-generation Hi-Fi crowd (World War II and Korean war-aged) was followed and replaced by boomers (Vietnam war and later), whose music was almost-exclusively studio recorded. In that context, High Fidelity has somewhat less meaning and relevance. Fidelity to what? Rock ’n’ Roll and other Pop music is recorded to sound "good", not accurate in terms of fidelity to an original acoustic event.
Gordon dismissed the use of recordings of electric guitar as material with which to evaluate Hi-Fi gear, arguing that there is no way to know what the recording should like. Younger reviewers, including John Atkinson, himself a player of electric bass (which he mistakenly calls a bass guitar ;-), argue that the sound of a Les Paul into a Marshall amp has a very well-known sound, as does a Telecaster plugged into a fender Deluxe Reverb, and Fender Precision bass into an Ampeg SVT.
My gold standard is vocals and acoustic instruments such as piano, guitar, upright bass, mandolin, dobro, fiddle, drumset & cymbals, brass (sax, trumpet) etc. I've played in bands with many of the above, and know the sound of them well. Sheffield Labs direct-to-disk LP's come mighty close to the sound of live Pop music.
This boomer's gold standard is live, acoustic music - classical mainly, including orchestral, vocal and instrumental + some acoustic pop and jazz. I was a choral singer for many years, former church organist, played briefly in a band, and I'm married to an orchestral bassoonist. We've both got a pretty good idea what acoustic instruments and voices sound like in real space.
We play some rock too - but that's not our gold standard.
i hate to sound obvious or trivial, but unamplified music is the gold standard for unamplified music. Most non-classical music is made to be amplified.I love small jazz music (piano/bass/drums) and even in live sessions it is amplified and mixed to match the taste of the person at the board.Clearly rock music is "meant to be" amplified and mixed no matter what, live or recorded.Classical music is frequently unamplified. Even Broadway with a full orchestra is amplified and mixed.To me, it is just about finding a sound that I like.