![]() ![]() If it is still not possible to identify the cause of the hum or buzz, we recommend testing the device at a different location (e.g. Alternatively, disconnect all of them and then reconnect them one by one in order to identify which one is causing the problem. Nearby Electrical DevicesĮliminate the possible sources by disconnecting nearby electrical devices one by one. You may also have to separate polarized plugs (two-prong) from grounded plugs (three prong), by connecting them to separate circuits. Note that even if the power supply of your laptop computer is not connected, your setup may still be vulnerable to ground noise from an external device with its own power supply.Īll devices that are physically connected to each other should share the same power outlet. ![]() Shared Power OutletĪlways connect your devices to the same power outlet (e.g. If you are going to use a replacement power supply unit, make sure that its specifications meet the ones required by your computer in order to avoid permanent damage. Disconnect your computer from your power supply so that it runs on battery power and verify if this resolves the issue. Power SupplyĪ low quality power supply unit can lead to ground loop noise, particularly on laptops. Some devices offer a switch for this whereas others may require a modified audio cable or a DI-Box (see Balanced Cables and DI Box chapters at the bottom of this article). Never lift the ground of the power connection!Ĭontact the manufacturer of your device before lifting the ground to find out if ground lifting is supported on your device. If you find the device that introduces the ground loop, a ground lift of the audio connection may solve the issue. To check if the amplifier or active monitors create the ground loop, monitor your audio signal from the headphones output of your device (while the amplifier/active monitors are disconnected). external harddrives, MIDI controllers, etc.). This applies to all peripheral devices you may have connected (e.g. from your computer, mixer or MASCHINE+) but not the amplifier and / or speakers. In order to find out where the ground loop arises, disconnect all peripheries from your main device (i.e. The troubleshooting steps below outline the most common solutions. Resolving a ground loop requires some investigation. Electrical devices nearby such as fridges, electrical heaters, elevators, fans, dimmer switches, etc.Peripheral devices connected to your computer.This can be caused by devices that introduce an electric potential to the ground connection. stage pianos) to an audio device without interference.An unwanted hum or buzz can be heard in the audio signal. "The FGA35 is a compact transmitter and ideally suited for connecting instruments (e.g. Length including connection cable: approx.Galvanically isolated inputs and outputs, reduces noise and hum.to car audio systems, especially while charging the audio device. Great for use in cars when connections external players such as iPods, iPhones, etc. Stereo line transformer: small design designed for preventing signal and noise interference ground and hum loops which may occur when connecting MP3 players, car audio, or similar to PC sound cards or laptops, computers and even hifi systems, commercial audio, PA systems, jukeboxes and more. FGA-35 - Monacor 3.5mm Noise Isolation Cable Transformer Number: 21.2420 ![]()
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