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Electronic Music Laboratories (EML) | ElectroComp Model 101


The ElectroComp 101 was the successor to the rare ElectroComp 100 from Electronic Music Laboratories (EML), a small synthesizer company based out of Connecticut in the USA. Like the ARP 2600, the 101 was a patchable (1/4'' patch cords) semi-modular synth with a pre-wired voice path that could be over-ridden via patching. But unlike the ARP (or Minimoog for that matter), the 101 had as many as four oscillators (two of which could go sub-sonic, for use as LFOs) with multiple waveforms that you could sweep between using its rotary knobs. The 101 was also Duophonic so you could play up to two notes at once. Another major distinction was that unlike Moog and ARP, who used transistors that would tend to drift out of tune under various operating temperatures, EML used op amps which proved to be far more stable and reliable.

Other onboard features included a voltage controlled 12 dB/oct multi-mode filter with resonance, two envelope generators, ring/amplitude modulator, noise, and sample-and-hold (they call this the "Sampler"). In addition, the 101 makes no distinction between control voltage and audio paths allowing just about any source to be patched to any control or audio input in any order. The 101 could easily be closed, secured and carried inside its wood casing.

In its day, the 101, as most of EMLs instruments, were marketed and sold to universities and other educational markets. But with the 4-oscillator architecture, multi-mode filter, and elaborate patch control, the EML-101 was undoubtedly one of the most flexible of all of the portable patch-synthesizers available at its time of manufacture. So it did not take long for it to find its way into mainstream music.

BrandElectronic Music Laboratories (EML)
ModelElectroComp Model 101
Engine TypeModular (Semi)
Voices (max)2
LFO2 VCO's could be used as LFO
Engine Detailed4 VCO, Pink Noise, Pulse, Pulse Variable, Saw Down, Saw Up, Sine, Square, Triangle, White Noise
Filter (VCF)12dB Slope (2-pole), Band Pass, Band Reject, High Pass, Low Pass, Resonance
Envelope (VCA)2 ADS
FXSample and Hold
Key typeKeys
AudioStereo Out, mono in
CV-gateCV I-O
Produced:1972 - 1982
Legend: Obvious Y: Yes, N: No, N/A: Not Applicable
VCO Voltage Controlled Oscillator DCO Digital Controlled Oscillator
LFO Low Frequency Oscillator Sub Sub Oscillator
VCF Voltage Controlled Filter VCA Voltage Controlled Amplifier
Velocity As with a piano, the harder you hit a key, the louder the sound, unlike most organs which always produce the same loudness no matter how hard you hit a key. Aftertouch Pressing a key after you activated it. Channel Aftertouch, no matter which key, it will send a Channel message. Poly Aftertouch, sends the pressure per key instead of the whole channel.
Values for OSC, LFO, Filter, Envelope are per voice unless stated otherwise.


If you like to discuss or talk about synths in all forms (including VST and modular), you are welcome to join the Facebook group "The Hard, The Soft and The Modular".

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