🏷️ Basic Information Identification Make: Oberheim Model: Four Voice Year: 1975 Generation: First Generation 📋 Manual Details Document Information Manual Type: Owner's Manual Language: English Page Count: N/A (Digital Product) Format: Digital (WAV Samples) ⚙️ Engine Specifications Oscillator Configuration Engine Type: Analog Synthesizer Modules (SEM) Displacement: 4 x Dual-Oscillator SEMs Power: Variable (depending on patch and settings) 🔧 Transmission Control Interface Type: Analog Mixer and Filter Control Gears: N/A (Non-Mechanical) 📐 Dimensions Physical Form Length: N/A (Modules are interconnected) Width: N/A (Modules are interconnected) Height: N/A (Modules are interconnected) Weight: N/A (Modules are interconnected) 🔧 Maintenance Operational Guidelines Service Interval: Regular calibration and cleaning recommended Oil Capacity: N/A 📄 Features Sound Generation Oscillator Count: 8 (2 per SEM) Filter Type: Oberheim SEM State-Variable Filter Envelope Generators: 4 x ADSR Envelopes (1 per SEM) Mixer Topology: Analog Mixer Voicing Modes: Monophonic, Paraphonic Keyboard Interface: Optional (typically Oberheim or compatible) Connectivity Audio Outputs: Individual SEM outputs, Master output Control Voltage I O: Standard for SEMs (CV In/Out) Effects Lfo Count: 2 (typically Low Frequency Oscillators) Portamento: Yes 📄 Technical Specifications Power Requirements Power Supply: External power supply unit Signal Path Waveform Options: Sawtooth, Pulse, Triangle, Square (variable width)