That will result in ProxyStream always working. it’s right?
No. Like CD quality source is not applied ProxyStream.
Is it possible to add the bit-depth limitation setting, such as Limited Bit-depth (16/24/32, default: No), to the UPnP device configuration?
When WPRX is working, fixed bit depth 24 is used. Currently, I am thinking this behavior is enough.
When playing PCM (Wav) over UPnP, the application does not know the performance limits of the device. Only MIME types are notified.
Now you are talking about bit depth limits, but in the future, someone may also be talking about sample rate limits.
I have not yet decided what it should be, but in this case, I would probably prepare converted files for a less capable device (since I think there are few files in a more capable format).