Our website provides a free download of LSI Convolution 6.0. The actual developer of the free software is Brown University. The software is included in Office Tools. The following version: 6.0 was the most frequently downloaded one by the program users.
From the developer:
LSI Convolution is a very helpful tool for students.
Two key properties in signal processing are "linearity" and "spatial invariance". Students can examine these properties by placing and scaling two impulse functions and then dragging a filter function over them (just as in the Impulse Response applet).
You may want to check out more software, such as Reverberate, Ultimate Keyword Hunter or Waves IRx, which might be related to LSI Convolution.