How on earth does plugging a cable into a lyre work? :/ I dunno, but cool anyways. (They can't use the same technique as an acoustic guitar, because that has a mic on the inside, whereas there is no inside of a lyre, it must be solid to vibrate right.)
Electric equipment behaves differently, for the entire instrument itself doesn't shake, for there are magnetic bars which pick up the vibrations of the strings. These are converted to electrical potentials, which flow in the direction of the cable output which is built into the device which you plug your audio cable into. This is the same principal with the electric violin.
The major sound differences between the electric and the acoustic are majorly down to the differences between the instrument properties itself (Like mass, and resistance to elastic deformation) as opposed to the pickup method, which contributes for less.