SEQUENTIAL OB-6 Keyboard

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