Digitone's sound engine is based on a four-operator FM architecture, as popularized by some of Yamaha's post-DX7 instruments like the DX27, DX11, and TX81Zz. But with the ultimate aim of making FM sound design as approachable as possible, the Digitone consolidates things down into the most essential parameters, with visual feedback on the OLED screen to offer a representation of how the sound is being affected. The operators, which can be thought of as traditional oscillators combined with their own pitch and amplitude envelopes, may be re-arranged via eight different algorithms. These algorithms allow different ways for the operators to modulate each other, thus resulting in different flavors of FM. There are also parameters to define pitch ratios for each operator in relation to the note played by the sequencer or a keyboard, plus waveform morphing, detune, feedback, and a crossfade mix between separate audio paths denoted as X and Y.