Not a Note 9, but used a Cyrus DAC with S9 and 10 and an AQ Cobalt with S20 and Fold.
You usually need a support app to enable a mobile DAC bypass, I used USB Audio Player Pro.
Regards Obsydian - (Car & Tech Evangelist)
MY DEVICES: ZFold4, Watch6 Classic, Book2 Pro i5 5G [Laptop], Buds Pro2, M70A 32 & 43”; [Monitor], Smart Tags, Dell Inspiron G5 [Laptop] / FAMILY DEVICES: ZFlip3, ZFlip4, ZFlip5, Watch6 Classic, S8 Ultra; S7+ [Tablet], Buds Pro, iPhone 12, iPad Air 2, Air tags, iPad Mini 5, iPad Pro 12.9 GEN2 [Tablets] / HOME DEVICES: QN95A [TV], Q900A / SWA900S [Soundbar, Rears], MC28M6075 and MC32K7055 [Microwave], Jet 75 Complete (Vacuum), Samsung Level [Speaker]