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, 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.