I have an iFi MicroDSD DAC connected via fiber-optic to an Apple Airport Express. Is it possible to use Audirvana to send hi-bit rate data to the DAC. As is, only 44.1kHz PCM goes through.
With this configuration you can only play through AirPlay … then 16/44.1 is the maximum you can send
No, you can’t do that. AirPlay defaults to 16/48. Even worse, it resamples everything to that resolution.
Better get a UPnP bridge.
Is there a UPnP bridge for Aufirvana on a Mac and a remote iFi DAC?
You can start with RPi running Volumio.