amplitude modulation

Tremolo is a type of low-frequency amplitude modulation .

modulation achieved by variations in volume

For the record, tremolo is modulation achieved by variations in volume, while with vibrato vibrato is achieved by variations in pitch.

a rapid alternation of two notes

A tremolo is a rapid alternation of two notes.

a rapid fluctuation of the volume of a note

in standard usage, tremolo is a rapid fluctuation of the volume of a note, while vibrato is a fluctuation in pitch.

In standard usage

in standard usage, tremolo is a rapid fluctuation of the volume of a note, while vibrato is a fluctuation in pitch.

a repetitive change in amplitude of a sound source

The tremolo simply is a repetitive change in amplitude of a sound source.

a trembling effect

In music, tremolo (), or tremolando (), is a trembling effect.

one of the earliest guitar effects

Tremolo is one of the earliest guitar effects and was commonly found built into many ’60s tube amps, such as Fender’s Vibrolux and the Vox AC30 – and now the Vox AC30 appears in a huge variety of stompbox guises, which is why we have such rich pickings for our best tremolo pedals guide.

an amplitude modulation effect that was initially implemented on many guitar amps and still is to this day

Tremolo is an amplitude modulation effect that was initially implemented on many guitar amps and still is to this day.