Received the Onix Alpha 4 hours ago. Break-in exists! From just mids when just opened, to mainly treble an hour later, to quite balanced now.
It works with the iPhone 15 "standard": Tidal app works well.
It works with Audirvana in Mac fine. When connected to Mac, the button acts as pause-play.
So far I could only compare it with a Questyle M15 (not "I") and a Khadas Tone2 Pro. The Khadas was clearly better than the Questyle, (better soundstage and clarity, although Questyle timbre seemed more nice) although less portable (can only work off a computer). Onix is much more spacious than both. I'd not judge timbre yet until I am sure it has settled.
Testing with Ultimate Ears UERR. Known for soft treble, but improves a lot with powerful amplification.
Later (when I am not working) I will compare it to the other CS43198 DAC I have, the Ibasso DC04.