Hello:

You are correct in assuming that the Mp3 encoded files will not work.  The required PCM .wav files should be uncompressed and if so, they work without issue.

All of our dialogue (voice-overs) is produced in our in-house recording studio via Nuendo (digital recording suite) and exported as uncompressed PCM .wav files.  Various and sundry voice altering hardware and software processing is employed to create the different characters.

That said, I must add that although I really enjoy working with P7 (Mac/Intel 8 core) and anxiously await the release of the much touted Poser Pro, I have not been impressed with Talk Designer.  Instead, aside from performing manual lipsynch in either Poser or Maya, we have been using Daz Production's Mimic.  If you plan on doing much in the way of lipsynch with Poser you might take a gander at this easy to use, yet sophisticated piece of software which allows for all kinds of phoneme tweaking and outputs a much more realistic lipsynched end-product.  The only caveat being that the Mac version requires .aif files rather than .wav but that has not been an issue for us.

As for your original question, regarding the availability of PCM files, our company, Avatar Creations, Inc,  a subsidiary of Freefictiononline, Inc, does indeed offer an audio production service.  If that is what you are in search of you can send off an e-mail, including the details (i.e. scripted dialogue, gender of character, etc.) to ata@freefictiononline.com.

Cheers