Eq effects chain

Hum in pedalboards is usually “ground loop hum.” You have two paths to ground, your audio ground and your power supply ground. You could use an expensive power supply with isolated grounds. But all you have to do is break one of the ground connections. You could disconnect the audio ground at one end of each of your patch cords. Or better, if you use one power supply, connect the hot and ground to only one of your pedals. Clip the ground wire on all the other pedal connections in your daisy chain. The power connections will then get their grounds through the audio grounds. No more hum

Daniel N. Flickinger introduced the first parametric equalizer in early 1971. His design leveraged the high performance op-amp of his own design, the 535 series (USPTO #3727896) to achieve filtering circuits that were before impossible. Flickinger's patent (USPTO #3752928) from early in 1971 showed the circuit topology that would come to dominate audio equalization until the present day, as well as the theoretical underpinnings of the elegant circuit. Instead of slide potentiometers working on individual bands of frequency, or rotary switches, Flickinger's circuit allowed completely arbitrary selection of frequency and cut/boost level in three overlapping bands over the entire audio spectrum. Six knobs on his early EQ's would control these sweepable filters. Up to six switches were incorporated to select shelving on the high and low bands, and bypassing for any unused band for the purest signal path. His original model boasts specifications that are seldom met today. [ citation needed ]

Eq effects chain

eq effects chain


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