TVS-1

Oberheim TVS-1

Released: 1975

MSRP: $2000US

Synopsis:

Two SEM modules with a digitally scanned keyboard. Sequencer and S/H was optional. Sequencer is more of an arpeggiator than traditional sequencer. Architecture Class: Conventional (subtractive).

Ebay Description:

The Oberheim TVS-1 (Two Voice) is a 37 key, duophonic analog synthesizer, featuring dual oscillators (with sync), resonant multimode (low, band, notch, or high pass with FM) filter, dual ADS envelopes, an LFO, and CV IO.

Physical

Form Factor	Dimensions	Weight	Audio Input	Audio Output	Communication Port	Control Input	Control Output	Switch Input	Power
37 keys	?	?	filter	mono	no	SEM2: CV gate	Voice2: CV gate	no	?

Interface

Compatibility	Multitimbral Memory	Program Memory	External Storage	External Programming	UI Input	UI Output
-	no	no	no	no	knobs/switches	LED

Architecture

Multitimbral	Polyphony	Unison	Architecture
2	2	yes	VCO1+VCO2->VCF->VCA

Output

Effects	Pan Modulator	Volume Modulator	Headphone
no	no	ENV1	no

Control

Arpeggiator	Arpeggiator External	Sequencer	Sequencer Memory	Sequencer External	Continuous	Program Change
dedicated 1-8 step sequencer/arpeggiator for each module (clock can be key scaled)	N/A	see arpeggiator	N/A	N/A	no	no

Keyboard

Key Pressure	Chord Memory	External Control	External Sustain	Key Scaling	Velocity Curves
no	no	CV gate	no	no	no

Source

Name	Signal Class	Waveform	Octave Range	Amplitude Modulator	Harmonics Modulator	Pitch Modulator	Wave Assign Modulator
VCO1a	analog	saw pulse mix	+-1	no	PWM: LFOa ENV1a CV	LFOa ENV1a CV portamento S/H sequencerCV1	no
VCO2a		saw pulse mix	+-1	no	sync:VCO1a PWM: LFOa ENV2 CV	LFOa ENV2a CV portamento S/H sequencerCV1	no
VCO1b	analog	saw pulse mix	+-1	no	PWM: LFOb ENV1b CV	LFOb ENV1b CV portamento S/H sequencerCV2	no
VCO2b		saw pulse mix	+-1	no	sync:VCO1b PWM: LFOb ENV2b CV	LFOb ENV2b CV portamento S/H sequencerCV2	no

Filter

Name	Signal Class	IC	Resonant	Shape	Frequency Modulator	Resonance Modulator	Shape Modulator
VCFa	analog	discrete	yes	low\|band\|notch\|high pass	LFOa ENV2a CV	no	no
VCFb	analog	discrete	yes	low\|band\|notch\|high pass	LFOb ENV2b CV	no	no

Envelope

Name	Level	Rate	Loop	Polarity	Trigger	Level Modulator	Rate Modulator
ENV1a	sustain	attack decay	no	no	no	no	no
ENV2a	sustain	attack decay	no	no	no	no	no
ENV1b	sustain	attack decay	no	no	no	no	no
ENV2b	sustain	attack decay	no	no	no	no	no

LFO

Name	Waveform	Delay	Polarity	Sync	Delay Modulator	Level Modulator	Rate Modulator
LFOa	triangle?	no	no	no	no	no	no
LFOb	triangle?	no	no	no	no	no	no
S/H	random	no	no	no	no	no	no

Conventional Models

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