The Roland SH-4d is a digital desktop synthesizer that combines multiple synthesis types, including virtual analog (VA), wavetable, FM, and PCM. It features 11 oscillator models (such as SH-4d, SH-3D, SH-101, and JUNO-106), a 5-part multitimbral architecture (4 synth parts + 1 rhythm part), a built-in pattern sequencer, and extensive hands-on controls.