![]() Dave B liked Magnetic Kinetic Art Display.Mathias Anders liked The Recreator 3D - Make Recycled PET#1 3D Filament.RunnerPack liked Marblevator, Grippers.Pat on Contrary View: Chatbots Don’t Help Programmers.Alphatek on Tree Planting Festivals, Air Cannons, Self-Burying Seeds, And The Complexities Of Reforestation.Wereweeb on The Integral Molten Salt Reactor And The Benefits Of Having A Liquid Fission Reactor.Andy Pugh on Well Documented Code Helps Revive Decades-Old Commodore Project.Jon Mayo on Contrary View: Chatbots Don’t Help Programmers.theRainharvester on YouTube on Farewell American Computer Magazines.Artenz on Contrary View: Chatbots Don’t Help Programmers.Posted in digital audio hacks Tagged eq, graphic eq, graphic equalizer Post navigation We’re more used to graphical displays for off-the-shelf devices. Unexpectedly such analogue equalizer have been few and far between here at Hackaday so it’s particularly pleasing to see. The resulting equalizer is neatly built upon a PCB with a 4-AA-cell power supply, and makes for a self-contained audio component. ![]() Unexpectedly their outputs are not mixed because it proves surprisingly difficult to ensure all the filters have the same gain, instead they are in series with the signal path passing through all filters. His project makes for a fascinating foray into analogue filter design, as well as an understanding of how an equalizer combines multiple filters. On modern hi-fi the task is performed in software, but wanted an analogue equalizer more in the scheme of those fancy tone controls than the professional devices. On a hi-fi these arrays of variable gain notch filters were little more than a fancy version of a tone control, but in professional audio and PA systems they are used with many more bands to precisely equalise a venue and remove any unwanted resonances. There was a time when any hi-fi worth its salt had a little row of sliders on its front panel, a graphic equalizer. ![]()
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