You could have downloaded PixRecorder 3.0 for Mac from our software library for free. The application lies within Audio & Video Tools, more precisely Players. The actual developer of this software for Mac is H2D2.
From the developer:
PixRecorder can synchronize your favourite music with pictures, art and graphics. The VJ Tool modulates the tone and the image to create reorganized projections based on the music. The app reacts to the input tone signal and synchronizes graphics, creating original pictures from music. The graphic reacts to the volume and frequency of the tone signal. A higher volume enlarges pictures, while a lower volume reduces pictures.