Bit99

Crumar Bit99

Released: 1985

MSRP: ?

Synopsis:

Swaps the Bit One Unison mode for a patch chain, slightly increases program memory, adds double/split memory, but amp EG can no longer be routed to pitch. Bit One noise and detune sliders are parameterized. Architecture Class: Conventional (subtractive).

Ebay Description:

The Crumar Bit 99 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, a patch chain, 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 program-increment	AC

Interface

Compatibility	Multitimbral Memory	Program Memory	External Storage	External Programming	UI Input	UI Output
Bit01 Bit99	23	75	tape	MIDI SysEx	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	MIDI-CC1 MIDI-Pitch Mod-Wheel Pitch-Wheel	MIDI pedal

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	noise pulse saw triangle (individually selected)	4' 8' 16' 32'	no	PWM:velocity	LFO1 LFO2 MIDI-Pitch Pitch-Wheel	no
DCO2	digital	pulse saw triangle (individually selected)	4' 8' 16' 32'	no	PWM:velocity	LFO1 LFO2 MIDI-Pitch Pitch-Wheel	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	MIDI-CC1 Mod-Wheel	velocity
LFO2	down-saw square triangle	yes	no	no	no	MIDI-CC1 Mod-Wheel	velocity

Conventional Models

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