Oberheim Key Knobby: Do1 -

: The first monophonic synth with user-programmable digital memory, breaking the strictly manual SEM paradigm.

: The first true polyphonic keyboard in this series, available in 4, 6, or 8-voice configurations. DO1 - Oberheim Key Knobby

: The interface encourages "exploratory" synthesis, where users can grab a knob to adjust filter resonance or oscillator frequency in real-time, which is essential for the "creamy" and "honey-like" sounds associated with the brand. : The first monophonic synth with user-programmable digital

The "Oberheim Sound" is defined by its , often contrasted with the "clinical" or "warm" sound of Sequential Prophet-series synths. This is largely due to the use of discrete oscillators and the unique 2-pole multimode filter found in early units. available in 4