Blue Cat’s FreqAnalyst Multi is a unique multiple tracks real time spectrum analyzer:

it lets you visualize the spectral content of several audio tracks on the same screen with extreme smoothness and high resolution, for both time and frequency.

Blue Cat’s Oscilloscope Multi is a unique multiple tracks real time waveform renderer and comparator:

it lets you visualize the content of several audio tracks on the same screen and compare them thanks to its X-Y view.

Blue Cat’s StereoScope Multi is a unique tool to compare the stereo image of several tracks in real time. It is the ideal solution for mixing: you can actually see which part of the stereo field every single instrument uses.

It can also be used to analyze an effect chain and see how audio effects in.