The D-50 is a digital synthesizer developed by Roland in the mid-1980s. It is known for its unique sound generation capabilities, utilizing a technique called linear arithmetic synthesis. This method combines sampled sounds with synthesized waveforms, allowing for a wide range of rich and complex tones. The D-50 features 64 voices of polyphony and offers various preset sounds, including strings, pads, and bells. Its user interface includes a series of sliders and buttons for easy manipulation of sound parameters. The D-50 has become a classic instrument, widely used in genres like pop, electronic, and film music.