The ultimate guide to Bluetooth headphones: LDAC isn't Hi-res - SoundGuys
Samung Galaxy S9 and S9+
Amazon.com: Rythflo Bluetooth Headphones, aptX-HD Wireless 5.0 Bluetooth Earbuds w/Mic in-Ear Magnetic Neckband Earphones 30Hrs Playtime, IPX7 Sweatproof Deep Bass Headset for Phone Call Music Sports : Electronics
How to check the Bluetooth Audio Codec of your speaker | aptX, LDAC, SBC, AAC - YouTube
Improve Bluetooth Audio on Your Galaxy S9 with Custom Codecs « Android :: Gadget Hacks
aptx HD support for Galaxy Note 9 - Samsung Community