AudioAnalyst

AudioAnalyst allows complex audio analysis using an ordinary sound card. Real Time Analysis and distortion analysis can be accomplished with user settable digital filters.
Main Features:
- Multi-threaded, makes use of multiple processors for fast RTA
- Tone generator can construct any type of waveform and noise. Useful for recording test CDs.
- Calibration tables can linearize the microphone.
- RTA results can be saved and used as "0 dB reference"
- 1/6th octave, 1/3 octave, 1/n octave filters can be designed through the filter design dialog.
- Oscilloscope mode, selectable sweep rate and trigger level.
- Create your own custom filters, bandpass, bandstop, lowpass, or highpass..