Hi. I´m an American researcher, writer, editor and translator, a native English speaker. I can search for people and companies working in the 3D audio field who use English, Portuguese or Spanish on the web, using your list of keywords as well as the translation of these and other relevant terms, and provide you with an Excel table with their names, contacts, etc. I can give you the results of a 4-hour search for 20 euros. Do you have other specific information you want about them? Please contact me for further discussion. Regards, David