#guitar

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I’ve been getting a lot of art block, so I work on fan art. Dirhhennia also get art block. I always imagine her being voice by Olivia Olson. Anyway Dirhheania is an amazing musician but nobody knows that. She keeps it to her self because she feels it’s the one thing she can be in charge of and nobody can take it away from her.

John prepares to track All You Need Is Love

John prepares to track All You Need Is Love


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taking a break during the Paperback Writer promotional film

taking a break during the Paperback Writer promotional film


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As someone who used to play the bass guitar, I can’t believe I didn’t know how a guitarpickup works. The basic idea is actually relatively simple but the complexity comes when engineering the sound we hear from Jimi Hendrix, Jimmy Page, and B.B. King.

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The mechanism is centered around Faraday’s Law of Induction. The guitar pickup in its simplest form is a permanent magnet(s) wrapped in a coil of wire. A permanent magnet is made from a ferromagnetic material (like iron) which is a special type of material where the “magnetic domains” are aligned with an external applied magnetic field. 

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The role of the permanent magnet is to magnetize the guitar string because it is also a ferromagnetic material like nickel or steel. When you pluck the string it vibrates and results in an oscillating(changing)magnetic flux through the coil. Because of Faraday’s Law of Induction this induces a signal(changing voltage) and thus current which is read by the amp to reverse engineer it into sound. Check out thisappletfrom the National High Magnetic Field Laboratory for a visual.

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Since the string’s movement determines the signal picked up, the pickups receive a strong signal when directly under a part of the string moving with a large amplitude and frequency. So when it is directly under a node(where the string doesn’t move) like in the above picture (for the 7th harmonic), one of the pickups gets a very weak or possibly no signal. So in a way the pickups act as filtersfor the different harmonics depending on their placements which is key to the sounds we hear in the music. So as you can see the exact engineering can become extremely complicated

Read more…National Mag LabGuitar Worldmore on harmonics here

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