A user said here:
Embedding existing SoundCloud clips is possible on Music.SE (and possibly other sites); it should be trivial to add that to other sites on an as-needed basis. – goldPseudo Oct 9 '14 at 22:16
I think it is potentially a very useful feature for sharing pronunciation samples, allowing for high quality and instructive answers. Currently, pronunciation is usually discussed in writing but this is a very poor way of transmitting the information. On the other hand, I tried answering pronunciation with some audio samples in https://chinese.stackexchange.com/a/39231/25265 , but without the Soundcloud embedding this is still not very practical.
EDIT: What is the decision? How many votes should be required to apply this change?