Do1 - Oberheim Key Knobby -

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

Oberheim’s design language is rooted in . Unlike later digital synths that moved toward menu-diving, the "Key Knobby" era—encompassing the OB-1 , OB-X, and OB-8 —prioritized having a dedicated control for nearly every parameter. DO1 - Oberheim Key Knobby

: The first monophonic synth with user-programmable digital memory, breaking the strictly manual SEM paradigm. : The first true polyphonic keyboard in this

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