Treble & Bass are really just fancy names for buzzy and rumbly, which are the two types of vibrations often found in sex toys and part of the criteria by which we judge them here at Bedbible. Buzzy is often cheaper and features a higher frequency that just stimulates the surface area of the skin, whilst rumbly vibrations are low-frequency, allowing them to stimulate deeper into the tissue. People can enjoy either and it really comes down to preference, so including both types in one toy is very exciting.