The AudioAnalyser application was designed to be a realtime frequency analyser for audio signals. You can combine the AudioAnalyser with my other application Multisine, if your soundcard supports the full duplex mode (only very old soundcards don't). With this combination you have a full equipped audio suite for your measurements. The application is written in C++ and uses the VCL library and Win Api calls. This version is the first release on CNET Download.com.