1. Yes
2. I don’t think you understand codec, the Zenith will have the software to decode FLAC/ACC sending PCM to the DAC. Unless you use the Bartok as a streamer through the ethernet connection where it takes the FLAC/ACC from a storage device or online service like Tidal then it will decode. The dCS is a streamer/ DAC.
3. Not that I am aware of.
2. I don’t think you understand codec, the Zenith will have the software to decode FLAC/ACC sending PCM to the DAC. Unless you use the Bartok as a streamer through the ethernet connection where it takes the FLAC/ACC from a storage device or online service like Tidal then it will decode. The dCS is a streamer/ DAC.
3. Not that I am aware of.