What are advantages and disadvantages of Bessel filter?

Bessel filters are known for their Excellent phase response, which makes them ideal for applications requiring minimal signal distortion, such as audio and communication systems. They provide a smooth roll-off and maintain a flat group delay, ensuring that all frequency components of a signal are delayed equally. However, their main disadvantage is that Bessel filters have a relatively gentle roll-off compared to other filter types, such as Butterworth or Chebyshev filters, which can result in less effective attenuation of unwanted frequencies. This means they may not be suitable for applications requiring sharp cutoff characteristics.