[Q] Is call audio locked/unlocked in the telephony app?

---

I'm trying to plunge into Android and after an afternoon of looking around (online and in books) I'm seeing very little discussion of CALL AUDIO itself. That is, the full two-way audio stream that is handled during a phone call.

What I'd like to do is save that stream out to a file. But the few references I've seen, seem to indicate
1-That's easy, there's a hook for just that call audio stream
2-That's conditional on the telephoney application having allowed that audio stream to be shared, and by default it is not shared/accessible.

So if the telephony application itself, as shipped in the phone, does not set a flag for sharing that audio stream, it cannot be shared. Unless you manage to break in and rewrite the telephony app in the phone itself, which I imagine is a non-trivial exercise for a newb!

The phone in question being an Atrix, or the Droids in general, which appear to all have this telephony audio stream in an ivory tower. (At least, a couple of programmers have told me they'll never be able to touch it.)

So...anyone with a rather specialized knowledge in this area to share? Has Motorola locked up their telephony audio out of reach? Or, am I totally missing the picture?

Seems like the SDK, the online references, the books (yes, I looked at books!) all don't bother to discuss telephony functions in any great depth, besides making calls.