Best USB-C to Audio Jack Adapter for FP4

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@Hans_from_Holland

I’m very new here, but have a lot of experience with using audio adapters on my USB-C phone socket.
For simple use you need an OTG adapter. Available with/without extra charging port.

I had thought one of the points of Type C was not needing OTG adapters; are you referring to something else here? The OTG adapters I remember were typically micro-B male to A female. Unless you want a split to provide power separately, there shouldn’t be a need to have an adapter other than a DAC+amp Type-C-to-3.5mm dongle.

@Hans_from_Holland

FP4 Bluetooth supports the AptX codec. That means FLAC (cd quality) streams.

AptX is a proprietary, lossy codec; it is neither FLAC, nor similar to FLAC, a lossless, open format; it is also not similar to CDDA CD audio. The FP4 does nominally have support for aptX, aptX HD, and aptX adaptive, but software support has been regressed recently, and it may not work for many users, even after the update that attempted to fix it, but fixed only aptX HD.

@Hans_from_Holland

For standard use with low-medium impedance headphones (read about this on the Internet) you could go for the FiiO DAC dongle series KA1, KA2, KA3 USB-C type (price ranges from 50-90 euros). I use the 90 euro KA3 which also supports a 4.4mm balanced connection.

Another, flexible option, for people who like wired headphones, is that the FiiO bluetooth amplifiers will also work as USB audio interfaces, so using them, you can switch between wireless and wired use.