@Ed_Davey, prompted by your experiments, I thought I’d do one of my own. For some reason, I’m not getting sync problems (at least so far).
Setup
See here. For the purposes of the experiment, I had the microRendu connected to the QUAD HiFi, and repurposed the RPi3+ IQaudIO Pi-DAC+ as a headphone driver. The RPi is using WLAN.
I grouped the following endpoints into a single zone:
- Desktop PC running Windows 10 (ethernet connected)
- microRendu + Dragonfly v 1.2 driving QUAD HiFi system
- RPi3 (WLAN connected) + IQaudIO Pi-DAC+ driving headphones
- RPi2 (ethernet connected) + HiFiBerry DIGI+ driving Denon 3808
The RPi+Pi-DAC+ is using the RC4 version of the Roon sw from IQaudIO, while the HiFiBerry is using version 1.0.3 of the sw.
All controlled via Windows 10 laptop using Roon Remote (using FLAC 44.1 kHz 16bit files)
And… no sync problems…