I didn’t realise that this eco system existed
Me either until Phuca's post inspired me to cut the USB cord and go optical. I was hard-headed and stubborn especially after investing in a good amount on USB cables. RW kept recommending if you want reference go optical, but I just kept brushing off. I was like whatev RW (hand in face).
Then Phuca put together a Anker 26800 + CCA rig and it triggered portable possibilities going optical. I bought 4 CCA's, but return them all because CCA is a buggy ecosystem and the sound is flat. I have another Justboom Digi Zero and that was flat as well, even with a Lifatec glass optical. The HiFiBerry was the only one to make redbook sound like hires. I regret not getting a Anker 26800, but battery banks come and go (Should of followed Phuca's gear).
Sometimes while listening, I feel it's getting close to the elusive "Mini-DAVE" unicorn. Similar to this Qutest post:
https://www.head-fi.org/threads/cho...official-thread.869417/page-303#post-15415837
B4 HifiBerry+Lifatec Glass = Borderline Desktop SQ
After HiFiBerry+Lifatec Glass = Desktop SQ, Borderline "Mini-DAVE"
LPS+HiFiBerry+Lifatec Glass = "Mini-DAVE"?
It helps that I'm running one of the most neutral cable equipment available:
https://theheadphonelist.com/the-silverfi-iem-r4-cable-royalty/
So a wombo combo of HiFiberry optical + Lifatec Glass + H2 + SilverFi R4 really hits the spot.
I just feel so fortunate I can run in such a small battery-powered with onboard LPS portable form factor or I can go desktop-size full-size LPS.
One of my reference sources are TARGET CDs which are flat transfers from the master source before sound processing was a thing.
http://www.thetargetcdcollection.com/
I started collecting TARGET CDs in the mid-2000s, but hires distracted me for a decade. Now these CDs are pretty expensive on eBay, but some prices are reasonable. If you go into used CD shops, sometimes you can find a diamond in the rough if you know what to target. Usually though, CD shops filters the good TARGET CDs from the main CDs.
The CDs being flat transfers really has really nice synergy with this pure neutral rig. The compressed stuff works well too, but nothing like being so close to the master source.