Multilayer ceramincs are great for applications where voltage is constant (ie. your smoothing off a voltage). However they are not good for use inline for AC voltages (i.e. audio and AC signal filters). The reason is that ceramic capacitors will give a piezo electric effect to an AC signal, which causes noise. For audio use a Poly of some type (Polypropelene is best for audio signal pass through).
Tantalum Capacitors
Tantalum capacitors have a couple of important design advantages:-
- They can be excellent at removing noise (for instance placed across power rails) and improving the EMC performance of a circuit.
- They are physically small
