Ok thanks for confirming.
Airplay supports 16 bit 44Khz playback which will cover the majority of Tidal tracks so they
do not play at lower resolution. However I guess you are asking about Tidal masters which play at 96KHz. Currently these are not available on the Tidal app and can only be played via the desktop version of Tidal or via Roon. If you play a Tidal master via the app it will play at standard resolution so Airplay is fine.
We will have an update to include Tidal inside Poly. However Tidal do not allow offline content to be stored or played. This is not an issue with Poly but due to the licensing restrictions with Tidal. If Tidal changes then yes we would be able to update and support it.
DSD is only supported via MPD at the moment and not via DLNA which 8Player uses - this update is coming. However it will work using the Glider app as this works using both MPD and DLNA. If it is not playing then Joe the developer of Glider is available on here and you can also email
support@chordelectronics.co.uk and we can take a look at your DSD files to see if there is any reason why they don't play.
I hope this helps with your decision.