I am currently working on an Audio Spectrum Visualizer that will display the different frequency bands present in an Audio signal using ferrofluids. This is different from conventional Audio visualizer projects that use LEDs for this purpose. At first, I wanted to make a big ferrofluid display ( With 864 Electromagnets), but as the cost and time required to make it was enormous, I settled with making a 12x12 (144 electromagnets) display. I have made all the Electromagnets on my own using Enamelled copper wire and Screws because the Electromagnets sold online were quite expensive. There will be a  separate cuboidal column made with transparent acrylic for all the frequency bands ( I am thinking about making a 7 band visualizer at first). Ferrofluid will be filled separately in these acrylic columns. There is still a lot of work left in this project and when completed it will be able to display the different frequency bands and the respective amplitudes of an Audio signal using ferrofluid.