RTA (TrueRTA Project File)
The RTA Audio file format
RTA is the file format extension used by project files created with TrueRTA. The program is used for testing audio systems. Sounds used for the testing or all kinds of settings can be stored in such a RTA file. This allows users of TrueRTA to test different systems with the exact same settings.
Technical details of RTA files
Other files with the RTA extension can be associated with the discontinued IBM Voice Type Language Vocabulary Format and RobotHelp RTA Data files.