Reiyin DA-02 DAC USB-A Digital to Analog Converter, 192khz 24bit USB to 3.5mm Audio Adapter with Analog and Optical Digital Output Mode - Red

Does what it says on the tin. Outputs have very little noise, and this addressed an issue I had with the Raspberry Pi 4's headphone jack having low output volume. I'm not sure I would use this specifically for the 192kHz output rate, but for 44.1kHz/48kHz rates (typical for AirPlay / shairport-sync) this works very well.

For the price this does it’s job exceptionally well. On the iPhone though (11) while using my sennheiser 569 it sometimes cuts to all static. Returned it and the new one did the same thing. I now only use it with my cheap office computer for better sound quality and there it has performed flawlessly. For 27 bucks it’s a good way to dip your toes in the water of usb dacs.

I was amazed at how easy the setup was; plug and play doesn't even come close. I installed this on my "simple" desktop first, as a test and it worked immediately. Then I moved it to my more complicated set up and it worked there as well. I haven't done any critical listening yet, as this was just to use external powered speakers for some applications. I use a Bose gaming headset for zoom/chat etc., but sometimes I need to listen to a phone message without grabbing my Bose. I couldn't be happier; I immediately ordered another for my "simple" desktop where the headphone jack is hidden somewhere and this can be right out front. Super!

I actually bought this to use as a way to pass digital signal from my phone all the way to a DSP in the car. I haven't installed the DSP yet, but in the meantime I've been using it with a USB-C OTG adapter and using the 3.5mm port to my radio's AUX input. The sound is better than I expected - maybe not as good as the Quad DAC in my LG phone, but very good nonetheless. It worked just as it should have right out of the box, no need to connect it to my computer to configure (YMMV). Using the OTG adapter allows my phone to charge at the same time which is nice. I will likely edit the review when I finally hook up my new DSP and have a chance to test the optical digital capability. At this point I don't have any reason to think that it won't work as expected. UPDATE: When using the optical output to my car DSP it randomly has hiccups/dropouts in the audio. I thought it was the optical cable at first but I tested the cable on another device and it worked fine. I also tried to change every setting I could think of on my phone and on my music apps - no change. It worked really well in analog mode when using an aux cable out to the stereo, and also works well with headphones. Disappointing about the optical issues though - it's the main reason I bought it.

With Apple Music now providing various levels of Hi-Resolution, Lossless music in their Music app, Apple's current hardware requires an external DAC to listen to it. No telling when or if Apple will respond with new hardware to match. With people listening in such low fidelity on small bluetooth speakers and music mixed to match this low level, perhaps, no one even cares about HiFi music anymore. If you do, for the time being you will need an external DAC or DACs incorporated in playback systems to avail yourself of this revolution. You can spend hundreds of bucks way up into the thousands to get a suitable DAC. Or, you can spend 22 dollars on the Reiyin DA-02 DAC USB-A Digital to Analog Converter, 192khz 24bit USB to 3.5mm Audio Adapter with Analog and Optical Digital Output Mode - Red. I did. With necessary adaptors for Lightning and USB C connectors, I used this device on my iPhone and 2020 MacBook Air through my 2.1 Denon system with B & W speakers and it sounded great. I even streamed Neil Young's NYA channel at the highest quality, though a wired connection and it sounded great too. I don't know if it better than a similar looking device that costs 3 hundred bucks or others costing way more. I do know for 22 dollars I have no regrets and would advise you to try this if you are ready to step up your digital music listening.

I bought this to connect a wired headset with mic directly to my PS4 via the USB port. Reiyin includes a photo in the product description that shows this connecting as a input (mic) and output device in the PS4 audio device settings, which it doesn’t do. The instructions included in the box only show it capable of connecting as an output device

With my 9th gen iPad the optical toslink out doesn't work with Amazon Music and would tops at 96kHz in Qobuz. Tidal HD (no Master) works ok too. I am not returning it as I plan to still use it for the headphone out when traveling. Its still a very useful device.

I’m finally able to connect my old Schiit stack, which has been collecting dust ever since they removed optical output from the MacBook Pro. I have it connected via a USB hub. There’s no volume control over TOSLINK, as expected. It simply shows up as an audio output under my system preferences and it “just works”—no drivers needed. Very happy this device exists, it seems to be unique.