An update:

On the down side, I haven't heard anything back from SRS Labs past a "Tell us what your application is and we may send you some data" letter (to which, of course, I replied).

On the good side, I've found out that a good friend of mine is an electronic equipment manufacturer, and I'm going to talk to him and his designer friend at some stage about it.

More as it develops.

Save the whales. Feed the hungry. Free the mallocs.