I have just experienced problems using Rode Wireless Go II mic receiver connecting direct USBC to USBC on the phone. The Rode System was designed for this use, in addition to other usages (such as 3.5 mil to camcorder). But clipping, distortion, and terrible sound are the result. Called Rode and they report that the S21Ultra (specificially, not other Samsung models) has problems with external mic not only with Rode but with other brands also. They think that it has to do with the high resolution the Ultra is designed to receive versus whatever is sent from external mic sources. Discouraging because I specifically purchased the Rode Wireless II GO system to be able to record good audio, especially at any distance, that cannot be recorded without many undesired effects from the native mic on the Samsung. I haven't called Samsung directly yet, decided to post here first. I hope this is being looked at by Samsung, as this is a big problem for those who want to use the Ultra for video recordings with good audio from external mic.
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