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.

: Introduced advanced software control (Page 2) while maintaining the physical knob-per-function layout. It is often cited as the most reliable and affordable of the classic vintage polys. Maintenance & Longevity

The "Key Knobby" lineage represents the evolution of polyphony and memory:

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.

: 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.

: Original parts, like specific DAC chips or SEM-style flange knobs, are increasingly rare. Tom Oberheim has been known to personally assist collectors with spare parts in rare instances. Sound Characteristics

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