Audiospex is a free audio dynamics analyser application designed to accurately display an input:output amplitude graph of any dynamics processor - compressors, limiters, expanders or gates. It can be used to confirm operation, align stereo devices or analyse the 'knee' of non-linear devices such as soft knee compressors or optical devices.
It is easy to setup - just connect the device you wish to analyse to the audio interface inputs and outputs of your mac, tell the app which connections you have used and off you go. It works sending a test signal to your device and measuring the signal back in real time.
Use any interface at any bit depth/sample rate
Configue the Frequency, range and resolution of analysis
Auto and manual calibration modes
Save and load analysis data using XML files
Print facility.