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Mark writes –

Here’s an electric bass created using 1 broken bass string, 1 piezo transducer, part of a cheap wooden easel leg, and 2 metal rods from a bookshelf.

DIY Electric stick bass – Link.

Related:
 Blog Bass
SensorBib upright bass augmentation – Link.

 Strange Guitar 10
Weird bass guitars – Link.

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HOW TO- Make a Guitar/Bass Pickup – Link.

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DIY Cardboard box upright bass – Link.