The instrument
The Oberheim OB-X, introduced in 1979, is a polyphonic analog synthesizer that marked a significant advancement in synthesizer technology. The OB-X series came in different voice configurations, including 4, 6, and 8 voices, with the OB-X-6 representing the 6-voice configuration. This flexibility allowed musicians to choose a model that best suited their needs and budget. The OB-X series was designed to replace the older SEM-based polyphonic systems, offering a more integrated and user-friendly interface while retaining the rich, analog sound that Oberheim was known for.
The OB-X series quickly gained popularity among professional musicians and was used by notable artists such as Herbie Hancock, Prince, Depeche Mode, Queen, and Van Halen. Its powerful sound and advanced features made it a staple in studios and on stages throughout the 1980s. The OB-X’s design and sound significantly influenced the development of future polyphonic synthesizers, solidifying its place in the history of electronic music.
Details
The Oberheim OB-X (6-Voice) features six independent voice cards, each equipped with two Voltage-Controlled Oscillators (VCOs) per voice. The OB-X's 12dB/octave lowpass filter, derived from the SEM modules, provides smooth and musical control over the sound, with adjustable cutoff frequency and resonance. The OB-X also includes an envelope generator with Attack, Decay, Sustain, and Release (ADSR) controls for shaping the amplitude and filter characteristics of the sound.
One of the standout features of the OB-X is its programmable memory, which allows users to store up to 32 presets. This feature, first seen on the OB-1 (1978) was a significant improvement over previous synthesizers, making it easier to recall complex patches during live performances or recording sessions.
The OB-X is equipped with a 49-key velocity sensitive keyboard with an expanded section of performance controllers including a pitch and a mod wheel, polyphonic portamento, unison mode, chord memory, note hold and more.