I'm Tim Post, a community manager for Stack Exchange, and the person that handled bringing Social Sound Design to the Stack Exchange network, along with merging our existing Audio community into this site.
Nothing is currently carved in stone, Social Sound Design didn't go anywhere
Please have a look at some of the topics on this, the 'meta' site, where Stack Exchange sites come to discuss things that affect the site that they're running collectively. I'd also like to apologize for the fact that you've found the experience to be a bit jilting, unexpected and unprecedented. We did put rather conspicuous notifications at the top of the site a week before, during and after the merge - but that didn't exactly help you if you hadn't been to the site recently. We learned a bit from that.
Social Sound Design is still here, just joined by the members of our Sound community. There's a lot more of us, things may seem a little strange, but what you're seeing boils down to growing pains that we're working hard to resolve.
I recently raised the issue of what the scope of the site should include now that we're a larger community - and I'd really love to have your input there. We've agreed so far that some of the questions probably aren't that great for Sound Design (or, great at all, really) and we're now having discussions of how we can help folks write questions that are equally interesting, or at least not off-putting, to everyone now participating on the site.
You have additional tools on this new platform
After we finish setting the bar for questions, iron out our topic guidance that new users see (on the old site, it was very vague - "of interest to anyone interested in sound") and reach a broader consensus, we'll probably also have advanced quite a bit in the cleaning up of tags. This opens some interesting possibilities:
The front page of the site will be orders of magnitude more interesting to you, the much more advanced Stack Exchange 2.0 system is very good at getting questions that are surely to interest you in front of you.
Tag filtering (highlighting / hiding) questions by certain tags is now much easier, much smarter, and the perfect way to drown out questions that aren't likely to interest you.
Please, bear with us, this is going to take a little bit of time
I'm on this site (mostly this meta site) daily looking for opportunities to help make this process go more smoothly, answer questions people have and work on the many janitorial tasks that remain ahead of us. I'm also in close contact with all of the site moderators, including the original Social Sound Design moderators such as Jay.
I'm not going to let a site you loved become a site you wish to leave because of this transition, but I'm asking for your patience and a bit of time to let me do my job. Everyone here is united in wanting a fantastic resource for Sound Design, and broader topics related to sound in general - but not things that drive experts away.
We need your input, we need your participation, and I'm very happy to have it now. Please stay with us, help guide us, and I think we'll emerge from this with something spectacular.
I can also be reached directly via email, my address is in my profile on all Stack Exchange sites.