Volumio works great with my ARCAM rdac und Topping D50s. They´re recognized automatically and everything runs stable. When I depower the DACs, volumio tells me that theyre not recognized but after repowering them and save settings again, everything is fine.
Nanosoung doesn´t work the way I wish. Runs only with the volumioversion with integrated nanosound from nanomesher. Installation as plugin doesn´t work (newest volumio, Raspberry 4, nanosound DAC2).
The powerbutton needs to be powered directly by the usb-plug on the nanosound board. Only powered by the raspberry it doesn´t work.
After switching the dac off and then on again the system doesn´t work and has to be booted again.
If you take certain things into consideration, it works:
you have to power only the DAC on the outer USB-Connector by 5 V with at least 2,5 A
don´t connect any other device to the Pi at the same time.
After I got these hints, my system (Pi 4, DAC2 Standard newest volumio with nanomesher plugin) works at least. The power-button on the DAC2 switches the whole system and the sound is really good.
The case I ordered with the DAC2 is a little too tight. Soldering points on the back of the Pi-card scratch an buckle the bottom plate. To my mind no big deal if you can get a good networkplayer for only 140 EUR incl. case, Pi and customs.
I agree with you. Nanosound DAC2 works perfect with older versions of Pi.
But with Pi4 it needs a 5V/3A power supply. Also if you have issues with the sound worth changing the boot config file