Ah, yes. You are right, there was. We talked about it before. But as I understand it is aptX only, no LDAC or aptX-HD or any of the newer standards. I tested Hugo2 previously with aptX and I didn't like the result at all.
With more and more BT5 smartphones coming out, if the DX220 has BT5, it'd make APTX and APTX HD obsolete. Roughly 1.4Mbps after overhead. There would be no need for the APTX compression or APTX HD "gentle" compression. BT5 is also a lot more stable, so much closer to the theoretical maximum of 1.4Mbps (again, after accounting for overhead) at very short distances (under 1 meter).
Since 44.1kHz/16bit needs about 1.36Mbps, (10MB/minute = 0.17MB/sec = 1.365Mbps), BT5 should make APTX and APTX HD unnecessary.
Of course probably some compression would be required, because 1.365 is aaaawwwfully close to 1.4, and thruput is never 100% efficient.
Maybe once BT 5 really kicks off, there will be a new codec with even "gentler" compression than APTX HD... They'll maybe call it APTX HD+ or something.
But...after that, when a future BT spec emerges that doubles throughput again, it'll eliminate the need for compression at all for 44.1/16 bit audio.
So.... anyway, hoping the DX220 is BT5.
Knowing just how out of reach the other DAPs I'm looking at are in price given my long list of non-DAP things I want to buy, I'm starting to come around again to the DX220, if the 4GB RAM rumor is true.
After all, I like the sound of the DX220, and though I've never heard the Amp 9's Korg NuTube, I want it (irrational since I've never heard it, I know, hahaha)