TrueRTA's audio spectrum analyzer software shows you a detailed picture of what you're hearing in real-time, that is, as it happens. You can create your own professional measurement system starting with TrueRTA software on your PC. Then add the measurement microphone, preamp and USB interface of your choice. TrueRTA accurately tests audio systems using a Windows PC with basic sound capability. TrueRTA turns your PC into a powerful audio test system normally seen only in better audio research and design laboratories.