How to fix the sound in the terminal server for a specific user?

Question

Audio

Users have weak computers. Sometimes it's easier to log into RDS on a powerful server and run applications there that require sound to be played. For example, I need to view a webinar inside an RDS session. The problem is that if there are many users, then the sound is randomly assigned to one user, hence 2 questions:
1) Is it possible to somehow multiplex the sound so that it is available to all users of RDS sessions and not just one? If so, what is the percentage of quality loss? What sound card should be based on, say, 5 users?
2) If point 1 is not possible, is it possible to assign the use of sound in RDS to a specific one user?