Could you elaborate on this ayszhang?
In English, "how does it sound?" is a question aimed at probing the listener for an opinion to "it" i.e. the matter mentioned. This matter could be a proposal or the actual sound (e.g. song, instrument, ...).
How does it sound? = What do you think of what you have just heard?
So what should the Korean equivalent be? -는 어떻게 들려요? (/어때?) ?