To play more with best DAC found so far i preapred and ordered custom PCB. This uncludes ESP32 module socket, power converter for PCM5102, and DAC itself. Just for fun also added 8 sensor buttons, IR reciever and OLEd screen. For now no specific plans, just made audio part produce sound and looking for specific project to drop in
And yes, i switched to ESP32 now. Having experimented a little, i see that single core ESP-8266 is not capable to handle wifi and mp3 audio decoding on single core. One way to go around that is to use external mp3 decoder, another it to use more cores. Second option looks more fun to me.
For now flashed great ESP32_MP3_Decoder to start with. It plays internet stream smoothly, and audio quality is great, as far as i can tell.
And last note. For this one i used 10uF ceramic caps instead of tantal ones. Normally they are not recommended for audio applications due to piezoelectric effects, but as far as i can tell, they are just good enough. I can't tell a difference, that is all that matters to me