The Roland VP-330 Vocoder Plus (mk1) is a vintage analog vocoder and string synthesizer released by Roland in 1979. It is one of the earliest vocoders ever produced and is renowned for its unique sound. The VP-330 features a built-in vocoder with two independent voices, a string synthesizer section, and a variety of effects. It also features a built-in microphone for vocoding and a variety of controls for shaping the sound. The VP-330 is still highly sought after by producers and musicians today due to its unique sound and vintage character.