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Bit One

Crumar Bit One

Bit One
Bit One (image courtesy of SoundDoctorin)

Released: 1984

MSRP: ?

Synopsis:

Typical hybrid (digitally controlled oscillators, analog filter and amplifier) subtractive synth with dual LFO's. Architecture Class: Conventional (subtractive).

Ebay Description:

The Crumar Bit One is a 61 key (velocity sensitive), 6 voice, bi-timbral digital/analog hybrid synthesizer, featuring dual oscillators, 24dB resonant low pass filter, dedicated VCF and VCA ADSR envelopes, dual LFOs, and MIDI.

Physical

Form Factor Dimensions Weight Audio Input Audio Output Communication Port Control Input Control Output Switch Input Power
61 keys ? ? no upper lower MIDI: IN OUT THRU tape no trigger sustain AC

Interface

Compatibility Multitimbral Memory Program Memory External Storage External Programming UI Input UI Output
- no 63 tape no parameter based LED displays

Architecture

Multitimbral Polyphony Unison Architecture
2 6 no DCO1+DCO2->VCF->VCA

Output

Effects Pan Modulator Volume Modulator Headphone
none no EG2 LFO1 LFO2 velocity yes

Control

Arpeggiator Arpeggiator External Sequencer Sequencer Memory Sequencer External Continuous Program Change
no N/A no N/A N/A Mod-Wheel Pitch-Wheel no

Keyboard

Key Pressure Chord Memory External Control External Sustain Key Scaling Velocity Curves
no no MIDI pedal 1 1

Source

Name Signal Class Waveform Octave Range Amplitude Modulator Harmonics Modulator Pitch Modulator Wave Assign Modulator
DCO1 digital pulse saw triangle (individually selected) 4' 8' 16' 32' no PWM:velocity EG2 LFO1 LFO2 Pitch-Wheel no
DCO1 digital pulse saw triangle (individually selected) 4' 8' 16' 32' no PWM:velocity EG2 LFO1 LFO2 Pitch-Wheel no
Noise analog noise - no no no no

Filter

Name Signal Class IC Resonant Shape Frequency Modulator Resonance Modulator Shape Modulator
VCF analog CEM3328 yes 24dB low pass EG2 key LFO1 LFO2 no no

Envelope

Name Level Rate Loop Polarity Trigger Level Modulator Rate Modulator
EG1 sustain attack decay release no VCF key velocity velocity:attack
EG2 sustain attack decay release no no key no velocity:attack

LFO

Name Waveform Delay Polarity Sync Delay Modulator Level Modulator Rate Modulator
LFO1 up-saw square triangle yes no no no Mod-Wheel velocity
LFO2 down-saw square triangle yes no no no Mod-Wheel velocity
Conventional Models
Orchestrator DS-1 DS-2 Performer T1 T2 T1-C CPB-1
CPB-2 Trilogy Stratus Composer Spirit Bit One Bit01 Bit99