Editing Modular synthesizer (section)

=== Electrical ===
Other differences are in the plugs used, which can match 1/4-inch (6.3&nbsp;mm) or 3.5&nbsp;mm [[Phone connector (audio)|phone connectors]], [[banana jack]]s, or [[breadboard]] patch leads; in the main power supply, which is most often ±12&nbsp;V<ref>{{Cite web|url=http://www.doepfer.de/a100_man/a100t_e.htm|title=Technical Details A-100}}</ref> or ±15&nbsp;V, but can range from 2.5±2.5&nbsp;V<ref>{{Cite web|url=https://www.tangiblewaves.com/diy-info.html|title = DIY Info for AE modular}}</ref> to 0±18&nbsp;V for different manufacturers or systems; in the trigger or gate voltages (Moog S-trigger or positive gate), with typical audio signal levels (often ±5&nbsp;V with ±5&nbsp;V headroom); and with control voltages of volts/octave, typically {{nowrap|1 V/octave}}, but in some cases {{nowrap|1.2 V/octave}}.

In most analog modular systems the frequency is exponentially related to the control voltage (such as 1 volt/octave or 1.2 volts/octave), sometimes called ''linear'' because the human ear perceives frequencies in a logarithmic fashion, with each octave having the same perceptual size. Some synthesizers (such as [[Korg MS-20]], [[ETI 4600 synthesizer|ETI 4600]]) use a system where the frequency (but not the perceived pitch) is linear with voltage.

Due to the continuously variable nature of knobs and sliders, reproducing an exact patch can be difficult.