Tom Oberheim & Dave Smith Introduce the OB-6
OB-6 Specifications
OSCILLATORS
Two discrete VCOs per voice
Continuously variable wave shape (sawtooth and variable-width pulse, plus triangle on oscillator 2) per oscillator
Pulse width per oscillator
Hard sync: oscillator 1 syncs to oscillator 2
Square wave sub-octave generator (oscillator 1) per voice
Low frequency mode (oscillator 2)
Keyboard tracking on/off (oscillator 2)
Oscillator detune amount for increased tuning instability, from subtle to extreme
MIXER
Oscillator 1 amount
Oscillator 1 sub-octave amount
Oscillator 2 amount
White noise amount
STATE-VARIABLE FILTER
Two-pole, resonant, filter per voice with low-pass, high-pass, band-pass, and notch functionality inspired by the original Oberheim SEM filter
Bi-polar filter envelope amount
Velocity modulation of envelope amount
Keyboard tracking: off, half, full
FILTER ENVELOPE
Four-stage (ADSR) envelope generator
Velocity modulation of envelope amount
AMPLIFIER ENVELOPE
Four-stage (ADSR) envelope generator
Velocity modulation of envelope amount
LOW FREQUENCY OSCILLATOR
Five wave shapes: sine, sawtooth, reverse sawtooth, square, and random (sample and hold)
Clock sync (internal or external MIDI clock)
Initial amount
Mod destinations: oscillator 1 frequency, oscillator 2 frequency, oscillator 1 and 2 pulse width, filter cutoff, filter mode, amp
X-MOD
Sources: filter envelope (bi-polar) and oscillator 2 (bi-polar)
Destinations: oscillator 1 frequency, oscillator 1 shape, oscillator 1 pulse width, filter cutoff, filter mode, normal to bandpass filter
AFTERTOUCH
Source: channel (mono) aftertouch with bi-polar amount
Destinations: oscillator 1 frequency, oscillator 2 frequency, LFO amount, amplifier envelope amount, filter envelope amount, filter mode
CLOCK
Master clock with tap tempo
BPM control and display
MIDI clock sync
ARPEGGIATOR
Selectable note value: 16th note, 8th note triplet, 8th note, dotted 8th note, quarter note
One, two, or three octave range
Up, down, up/down, random, and assign modes
SEQUENCER
Polyphonic step sequencer with up to 64 steps and rests
EFFECTS
Stereo analog distortion
Dual, 24-bit, 48 kHz digital effects, including: reverb (room, hall, plate, spring), delay (full bandwidth digital delay and emulated bucket brigade), chorus, flanger, phase shifters, and ring modulator
Delay sync
True bypass maintains fully analog signal path when digital effects are off
PERFORMANCE CONTROLS
Full-sized, semi-weighted, 4-octave keyboard with velocity and aftertouch
Backlit pitch and mod wheels
Spring-loaded pitch wheel with selectable range per program (1 to 12 semitones up and down)
Transpose controls for an 8-octave range
Hold switch latches held notes on
Polyphonic portamento
Unison (monophonic) mode with configurable voice count, from one to all six voices, chord memory, and key modes
Manual switch: when on, the front panel is live; what you see is what you hear
PATCH MEMORY
500 user and 500 factory programs in 10 banks of 100 programs each
Direct program access, including single-button access to the current set of 10 programs
IN/OUT
Left/mono and right audio outputs (2 x 1/4” phone jack)
Headphone output (stereo, 1/4” phone jack)
MIDI in, out, and thru ports
USB for bidirectional MIDI communication
Filter cutoff expression pedal input
Volume expression pedal input
Sustain footswitch input
Sequencer start/stop footswitch input
POWER
IEC AC power inlet for internal power supply
Operates worldwide on voltages between 100 and 240 volts at 50 to 60 Hz; 30 watts maximum power consumption
PHYSICAL SPECS
31.8” L x 12.7” W x 4.6? H (80.7 cm x 32.3 cm x 11.7 cm)
20 lbs (9.5 kg)
Walnut end panels
