When I am making an expresso on my coffee machine, the cups sometimes rattle one against the other due to the vibration and make an interesting noise.
I have tried to setup my homemade stereo contact mic by attaching one of the piezos to each cup with sticky tape.
During the recording I realized the wiring on the contact mics was a bit defective. One of the mics was not working properly, so I ended up with only two small clips that were stereo and useable...
The other portions of the recording one of the mics was not working or was too noisy, so I ended up with only one useable channel.
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