These are the same type of microphones you find in a recording studio but smaller to fit inside different types of instruments. They work similarly to the human ear drum in that sound pressure waves will move a thin conductive membrane across an electrified backplate to turn the sound waves into an electrical signal. These transducers offer the closest to the true sound of an instrument. ![]() Microphones convert the physical movement of air into an electrical signal. Any changes to sound and volume must be made on the amp the instrument is plugged into. Active pickups provide a stronger signal coming out of the guitar and often have volume and tone controls built in, while passive pickups are more of a plug and play style. Piezo pickups can come as “active” (requires a battery to work) or “passive” (doesn’t require a battery to work). These can sound much better for solo playing due to the lusher tonal quality. The other common type of piezo pickups is what is called a bridge plate pickup which adhere to the bridge plate inside of a guitar. ![]() This style of pickup works well for a wide range of applications, including playing in a group setting where there are many instruments and frequencies that need to blend. They are often what are called “under-saddle” pickups and create a crisp/clear tone that articulates the sound of the strings. These pickups convert the physical movement of a solid object, such as the vibrations of a guitars top wood, into an electrical signal. ![]() Piezoelectric (or piezo) are the most common type of pickup for acoustic instruments.
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