Technology since 1991/graphic equaliser idea vector tests

Again following 'Ministry of sound, since 1991' concept, I am thinking of making a classic graphic equaliser graphic out of technology that has been used and surpassed since 1991. This will work well as motion graphics in time to music. This obiously needs more work. I have only made a few vectors of game consol controlers (need more in this set) so far, but I plan to make various old mobile phones, floppy disks/computer tech/ cassete tapes, vcr tapes. as a range of sets.