Oberheim DSX

The Oberheim DSX (Digital Sequencer/System Expander) was a polyphonic digital sequencer and synthesizer control device released by Oberheim Electronics in the early 1980s. It was designed to work in conjunction with Oberheim's line of synthesizers, such as the OB-Xa and OB-8, to create complex and automated musical sequences and arrangements.

The DSX could store multiple sequences, each with multiple tracks, allowing for intricate polyphonic compositions. It featured a real-time recording mode, enabling users to input note data directly from a keyboard, and also offered step-time entry for precise control over note duration and timing. Crucially, the DSX employed a proprietary parallel digital interface to communicate with compatible Oberheim synthesizers. This interface transmitted not only note information but also performance data such as velocity and pitch bend, allowing for expressive and dynamic control over the synthesizers' parameters.

The DSX also included features for synchronizing with external devices, such as tape machines and drum machines, making it a central hub for controlling an entire electronic music setup. Its advanced features for its time made it a sought-after tool for professional musicians and studios looking to create sophisticated and evolving synthesizer-based music. However, the proprietary interface limited its compatibility primarily to other Oberheim instruments.