Sound quality comparison

[simoncn]

(25-08-2014 17:55)simoncn Wrote:  The correct way for a UPnP server to support multiple renderers with different capabilities is for the server to offer multiple streams in different formats to all renderers and let each renderer choose which stream format to play. If the renderer is capable of playing more than one of the formats offered by the server, it should choose the first in the list.

This description isn't quite correct. It's the control point that makes the choice of stream based on information provided by the renderer. There are two potential problems with this:

1) If the renderer doesn't advertise its capabilities correctly, the control point might not choose a stream that the renderer would be capable of playing.

2) The protocol for advertising renderer capabilities doesn't always include all relevant information. For example, a renderer can say whether or not it can play WAV streams but it can't say whether or not it's able to play 24-bit WAV streams.